diff --git a/src/components/providers/ProviderActions.tsx b/src/components/providers/ProviderActions.tsx
index e62d1584f..68c56166b 100644
--- a/src/components/providers/ProviderActions.tsx
+++ b/src/components/providers/ProviderActions.tsx
@@ -2,6 +2,7 @@ import {
   Activity,
   BarChart3,
   Check,
+  ChevronDown,
   Copy,
   Edit,
   Loader2,
@@ -14,9 +15,21 @@ import {
 } from "lucide-react";
 import { useTranslation } from "react-i18next";
 import { Button } from "@/components/ui/button";
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuLabel,
+  DropdownMenuTrigger,
+} from "@/components/ui/dropdown-menu";
 import { cn } from "@/lib/utils";
 import type { AppId } from "@/lib/api";
 
+interface OpenClawDefaultModelOption {
+  id: string;
+  name?: string;
+}
+
 interface ProviderActionsProps {
   appId?: AppId;
   isCurrent: boolean;
@@ -41,7 +54,8 @@ interface ProviderActionsProps {
   isReadOnly?: boolean;
   // OpenClaw: default model
   isDefaultModel?: boolean;
-  onSetAsDefault?: () => void;
+  defaultModelOptions?: OpenClawDefaultModelOption[];
+  onSetAsDefault?: (modelId?: string) => void;
 }
 
 // 主按钮的呈现状态。title 用于 disabled 态向用户解释为何不可点击；
@@ -79,6 +93,7 @@ export function ProviderActions({
   isReadOnly = false,
   // OpenClaw: default model
   isDefaultModel = false,
+  defaultModelOptions = [],
   onSetAsDefault,
 }: ProviderActionsProps) {
   const { t } = useTranslation();
@@ -240,18 +255,72 @@ export function ProviderActions({
             appId === "hermes"
               ? t("provider.enable", { defaultValue: "启用" })
               : t("provider.setAsDefault", { defaultValue: "设为默认" });
+          const defaultButtonClassName = cn(
+            "w-fit px-2.5",
+            isDefaultModel
+              ? "bg-gray-200 text-muted-foreground dark:bg-gray-700 opacity-60 cursor-not-allowed"
+              : "bg-blue-500 hover:bg-blue-600 dark:bg-blue-600 dark:hover:bg-blue-700",
+          );
+
+          if (
+            appId === "openclaw" &&
+            !isDefaultModel &&
+            defaultModelOptions.length > 1
+          ) {
+            return (
+              <DropdownMenu>
+                <DropdownMenuTrigger asChild>
+                  <Button
+                    size="sm"
+                    variant="default"
+                    className={defaultButtonClassName}
+                  >
+                    <Zap className="h-4 w-4" />
+                    {inactiveLabel}
+                    <ChevronDown className="h-3.5 w-3.5 opacity-70" />
+                  </Button>
+                </DropdownMenuTrigger>
+                <DropdownMenuContent
+                  align="end"
+                  className="max-h-72 min-w-64 overflow-y-auto"
+                >
+                  <DropdownMenuLabel>
+                    {t("openclaw.selectDefaultModel", {
+                      defaultValue: "选择默认模型",
+                    })}
+                  </DropdownMenuLabel>
+                  {defaultModelOptions.map((model) => (
+                    <DropdownMenuItem
+                      key={model.id}
+                      onSelect={() => onSetAsDefault(model.id)}
+                      className="flex min-w-0 flex-col items-start gap-0.5"
+                    >
+                      <span className="max-w-72 truncate">
+                        {model.name?.trim() || model.id}
+                      </span>
+                      {model.name?.trim() && model.name.trim() !== model.id && (
+                        <span className="max-w-72 truncate font-mono text-xs text-muted-foreground">
+                          {model.id}
+                        </span>
+                      )}
+                    </DropdownMenuItem>
+                  ))}
+                </DropdownMenuContent>
+              </DropdownMenu>
+            );
+          }
+
           return (
             <Button
               size="sm"
               variant={isDefaultModel ? "secondary" : "default"}
-              onClick={isDefaultModel ? undefined : onSetAsDefault}
-              disabled={isDefaultModel}
-              className={cn(
-                "w-fit px-2.5",
+              onClick={
                 isDefaultModel
-                  ? "bg-gray-200 text-muted-foreground dark:bg-gray-700 opacity-60 cursor-not-allowed"
-                  : "bg-blue-500 hover:bg-blue-600 dark:bg-blue-600 dark:hover:bg-blue-700",
-              )}
+                  ? undefined
+                  : () => onSetAsDefault(defaultModelOptions[0]?.id)
+              }
+              disabled={isDefaultModel}
+              className={defaultButtonClassName}
             >
               <Zap className="h-4 w-4" />
               {isDefaultModel ? activeLabel : inactiveLabel}
diff --git a/src/components/providers/ProviderCard.tsx b/src/components/providers/ProviderCard.tsx
index 66e696497..4922f5801 100644
--- a/src/components/providers/ProviderCard.tsx
+++ b/src/components/providers/ProviderCard.tsx
@@ -5,7 +5,7 @@ import type {
   DraggableAttributes,
   DraggableSyntheticListeners,
 } from "@dnd-kit/core";
-import type { Provider } from "@/types";
+import type { OpenClawProviderConfig, Provider } from "@/types";
 import type { AppId } from "@/lib/api";
 import { cn } from "@/lib/utils";
 import { ProviderActions } from "@/components/providers/ProviderActions";
@@ -66,7 +66,7 @@ interface ProviderCardProps {
   activeProviderId?: string; // 代理当前实际使用的供应商 ID（用于故障转移模式下标注绿色边框）
   // OpenClaw: default model
   isDefaultModel?: boolean;
-  onSetAsDefault?: () => void;
+  onSetAsDefault?: (modelId?: string) => void;
 }
 
 /** 判断是否为官方供应商（无自定义 base URL / API key，直连官方 API） */
@@ -184,6 +184,15 @@ export function ProviderCard({
     return extractApiUrl(provider, fallbackUrlText);
   }, [provider, fallbackUrlText]);
 
+  const openclawDefaultModelOptions = useMemo(() => {
+    if (appId !== "openclaw") return [];
+    const config = provider.settingsConfig as OpenClawProviderConfig;
+    if (!Array.isArray(config?.models)) return [];
+    return config.models
+      .filter((model) => typeof model.id === "string" && model.id.trim())
+      .map((model) => ({ id: model.id, name: model.name }));
+  }, [appId, provider.settingsConfig]);
+
   const isClickableUrl = useMemo(() => {
     if (provider.notes?.trim()) {
       return false;
@@ -602,6 +611,7 @@ export function ProviderCard({
               onToggleFailover={onToggleFailover}
               // OpenClaw: default model
               isDefaultModel={isDefaultModel}
+              defaultModelOptions={openclawDefaultModelOptions}
               onSetAsDefault={onSetAsDefault}
             />
           </div>
diff --git a/src/components/providers/ProviderList.tsx b/src/components/providers/ProviderList.tsx
index dbb6be0ea..3796207c9 100644
--- a/src/components/providers/ProviderList.tsx
+++ b/src/components/providers/ProviderList.tsx
@@ -67,7 +67,7 @@ interface ProviderListProps {
   isProxyRunning?: boolean; // 代理服务运行状态
   isProxyTakeover?: boolean; // 代理接管模式（Live配置已被接管）
   activeProviderId?: string; // 代理当前实际使用的供应商 ID（用于故障转移模式下标注绿色边框）
-  onSetAsDefault?: (provider: Provider) => void; // OpenClaw: set as default model
+  onSetAsDefault?: (provider: Provider, modelId?: string) => void; // OpenClaw: set as default model
 }
 
 export function ProviderList({
@@ -438,7 +438,9 @@ export function ProviderList({
                     : isProviderDefaultModel(provider.id)
                 }
                 onSetAsDefault={
-                  onSetAsDefault ? () => onSetAsDefault(provider) : undefined
+                  onSetAsDefault
+                    ? (modelId) => onSetAsDefault(provider, modelId)
+                    : undefined
                 }
               />
             );
@@ -570,7 +572,7 @@ interface SortableProviderCardProps {
   activeProviderId?: string;
   // OpenClaw: default model
   isDefaultModel?: boolean;
-  onSetAsDefault?: () => void;
+  onSetAsDefault?: (modelId?: string) => void;
 }
 
 function SortableProviderCard({
diff --git a/src/components/providers/forms/OpenClawFormFields.tsx b/src/components/providers/forms/OpenClawFormFields.tsx
index 1c3e1e8ea..f964954e3 100644
--- a/src/components/providers/forms/OpenClawFormFields.tsx
+++ b/src/components/providers/forms/OpenClawFormFields.tsx
@@ -11,20 +11,8 @@ import {
   SelectTrigger,
   SelectValue,
 } from "@/components/ui/select";
-import {
-  Collapsible,
-  CollapsibleContent,
-  CollapsibleTrigger,
-} from "@/components/ui/collapsible";
 import { toast } from "sonner";
-import {
-  Download,
-  Plus,
-  Trash2,
-  ChevronDown,
-  ChevronRight,
-  Loader2,
-} from "lucide-react";
+import { Download, Plus, Trash2, ChevronRight, Loader2 } from "lucide-react";
 import { Checkbox } from "@/components/ui/checkbox";
 import { ApiKeySection, ModelDropdown } from "./shared";
 import {
@@ -80,9 +68,7 @@ export function OpenClawFormFields({
   onUserAgentChange,
 }: OpenClawFormFieldsProps) {
   const { t } = useTranslation();
-  const [expandedModels, setExpandedModels] = useState<Record<number, boolean>>(
-    {},
-  );
+  const [expandedModels, setExpandedModels] = useState<Set<string>>(new Set());
   const [fetchedModels, setFetchedModels] = useState<FetchedModel[]>([]);
   const [isFetchingModels, setIsFetchingModels] = useState(false);
 
@@ -102,8 +88,16 @@ export function OpenClawFormFields({
   const modelKeys = getModelKeys();
 
   // Toggle advanced section for a model
-  const toggleModelAdvanced = (index: number) => {
-    setExpandedModels((prev) => ({ ...prev, [index]: !prev[index] }));
+  const toggleModelAdvanced = (modelKey: string) => {
+    setExpandedModels((prev) => {
+      const next = new Set(prev);
+      if (next.has(modelKey)) {
+        next.delete(modelKey);
+      } else {
+        next.add(modelKey);
+      }
+      return next;
+    });
   };
 
   // Add a new model entry
@@ -152,16 +146,18 @@ export function OpenClawFormFields({
 
   // Remove a model entry
   const handleRemoveModel = (index: number) => {
+    const removedKey = modelKeysRef.current[index];
     modelKeysRef.current.splice(index, 1);
     const newModels = [...models];
     newModels.splice(index, 1);
     onModelsChange(newModels);
-    // Clean up expanded state
-    setExpandedModels((prev) => {
-      const updated = { ...prev };
-      delete updated[index];
-      return updated;
-    });
+    if (removedKey) {
+      setExpandedModels((prev) => {
+        const next = new Set(prev);
+        next.delete(removedKey);
+        return next;
+      });
+    }
   };
 
   // Update model field
@@ -274,10 +270,10 @@ export function OpenClawFormFields({
       </div>
 
       {/* Models Editor */}
-      <div className="space-y-3">
-        <div className="flex items-center justify-between">
+      <div className="space-y-3 border-l border-border-default pl-3">
+        <div className="flex items-center justify-between gap-3">
           <FormLabel>
-            {t("openclaw.models", { defaultValue: "模型列表" })}
+            {t("openclaw.models", { defaultValue: "模型配置" })}
           </FormLabel>
           <div className="flex gap-1">
             <Button
@@ -309,52 +305,59 @@ export function OpenClawFormFields({
         </div>
 
         {models.length === 0 ? (
-          <p className="text-sm text-muted-foreground py-2">
+          <p role="status" className="py-2 text-sm text-muted-foreground">
             {t("openclaw.noModels", {
-              defaultValue: "暂无模型配置。点击添加模型来配置可用模型。",
+              defaultValue: "暂无模型配置",
             })}
           </p>
         ) : (
-          <div className="space-y-4">
-            {models.map((model, index) => (
-              <div
-                key={modelKeys[index]}
-                className="p-3 border border-border/50 rounded-lg space-y-3"
-              >
-                {/* Role badge */}
-                <div className="flex items-center">
-                  <span
-                    className={`text-[10px] font-medium px-1.5 py-0.5 rounded ${
-                      index === 0
-                        ? "bg-blue-500/15 text-blue-600 dark:text-blue-400"
-                        : "bg-muted text-muted-foreground"
-                    }`}
-                  >
-                    {index === 0
-                      ? t("openclaw.primaryModel", {
-                          defaultValue: "默认模型",
-                        })
-                      : t("openclaw.fallbackModel", {
-                          defaultValue: "回退模型",
-                        })}
-                  </span>
-                </div>
-                {/* Model ID and Name row */}
-                <div className="flex items-center gap-2">
-                  <div className="flex-1 space-y-1">
-                    <label className="text-xs text-muted-foreground">
-                      {t("openclaw.modelId", { defaultValue: "模型 ID" })}
-                    </label>
-                    <div className="flex gap-1">
+          <div className="space-y-2">
+            <div className="flex items-center gap-2 px-1 text-xs text-muted-foreground">
+              <span className="w-9" />
+              <span className="flex-1">
+                {t("openclaw.modelId", { defaultValue: "模型 ID" })}
+              </span>
+              <span className="flex-1">
+                {t("openclaw.modelName", { defaultValue: "显示名称" })}
+              </span>
+              <span className="w-9" />
+            </div>
+            {models.map((model, index) => {
+              const modelKey = modelKeys[index];
+              const isExpanded = expandedModels.has(modelKey);
+              return (
+                <div key={modelKey} className="space-y-2">
+                  <div className="flex items-center gap-2">
+                    <Button
+                      type="button"
+                      variant="ghost"
+                      size="icon"
+                      onClick={() => toggleModelAdvanced(modelKey)}
+                      aria-expanded={isExpanded}
+                      aria-label={t("openclaw.toggleModelDetails", {
+                        defaultValue: "展开或收起模型详情",
+                      })}
+                      className="h-9 w-9 shrink-0"
+                    >
+                      <ChevronRight
+                        className={`h-4 w-4 transition-transform motion-reduce:transition-none ${
+                          isExpanded ? "rotate-90" : ""
+                        }`}
+                      />
+                    </Button>
+                    <div className="flex min-w-0 flex-1 gap-1">
                       <Input
                         value={model.id}
-                        onChange={(e) =>
-                          handleModelChange(index, "id", e.target.value)
+                        onChange={(event) =>
+                          handleModelChange(index, "id", event.target.value)
                         }
                         placeholder={t("openclaw.modelIdPlaceholder", {
                           defaultValue: "claude-3-sonnet",
                         })}
-                        className="flex-1"
+                        aria-label={t("openclaw.modelId", {
+                          defaultValue: "模型 ID",
+                        })}
+                        className="min-w-0 flex-1"
                       />
                       {fetchedModels.length > 0 && (
                         <ModelDropdown
@@ -363,95 +366,63 @@ export function OpenClawFormFields({
                         />
                       )}
                     </div>
-                  </div>
-                  <div className="flex-1 space-y-1">
-                    <label className="text-xs text-muted-foreground">
-                      {t("openclaw.modelName", { defaultValue: "显示名称" })}
-                    </label>
                     <Input
                       value={model.name}
-                      onChange={(e) =>
-                        handleModelChange(index, "name", e.target.value)
+                      onChange={(event) =>
+                        handleModelChange(index, "name", event.target.value)
                       }
                       placeholder={t("openclaw.modelNamePlaceholder", {
                         defaultValue: "Claude 3 Sonnet",
                       })}
+                      aria-label={t("openclaw.modelName", {
+                        defaultValue: "显示名称",
+                      })}
+                      className="min-w-0 flex-1"
                     />
-                  </div>
-                  <Button
-                    type="button"
-                    variant="ghost"
-                    size="icon"
-                    onClick={() => handleRemoveModel(index)}
-                    className="h-9 w-9 mt-5 text-muted-foreground hover:text-destructive"
-                  >
-                    <Trash2 className="h-4 w-4" />
-                  </Button>
-                </div>
-
-                {/* Advanced Options (Collapsible) */}
-                <Collapsible
-                  open={expandedModels[index] ?? false}
-                  onOpenChange={() => toggleModelAdvanced(index)}
-                >
-                  <CollapsibleTrigger asChild>
                     <Button
                       type="button"
                       variant="ghost"
-                      size="sm"
-                      className="h-7 gap-1 text-xs text-muted-foreground hover:text-foreground"
-                    >
-                      {expandedModels[index] ? (
-                        <ChevronDown className="h-3.5 w-3.5" />
-                      ) : (
-                        <ChevronRight className="h-3.5 w-3.5" />
-                      )}
-                      {t("openclaw.advancedOptions", {
-                        defaultValue: "高级选项",
+                      size="icon"
+                      onClick={() => handleRemoveModel(index)}
+                      aria-label={t("openclaw.removeModel", {
+                        defaultValue: "移除模型",
                       })}
+                      className="h-9 w-9 shrink-0 text-muted-foreground hover:text-destructive"
+                    >
+                      <Trash2 className="h-4 w-4" />
                     </Button>
-                  </CollapsibleTrigger>
-                  <CollapsibleContent className="space-y-3 pt-2">
-                    {/* Reasoning, Input Types row */}
-                    <div className="flex items-center gap-2">
-                      <div className="flex-1 space-y-1">
-                        <label className="text-xs text-muted-foreground">
-                          {t("openclaw.reasoning", {
-                            defaultValue: "推理模式",
-                          })}
-                        </label>
-                        <div className="flex items-center h-9 gap-2">
+                  </div>
+
+                  {isExpanded && (
+                    <div className="ml-9 grid gap-3 border-l-2 border-muted pl-4 sm:grid-cols-2 animate-in fade-in-0 slide-in-from-top-1 duration-200 motion-reduce:animate-none">
+                      <div className="flex min-h-9 flex-wrap items-center gap-x-8 gap-y-2 sm:col-span-2">
+                        <div className="flex items-center gap-2.5">
+                          <FormLabel
+                            htmlFor={`openclaw-model-reasoning-${modelKey}`}
+                            className="cursor-pointer"
+                          >
+                            {t("openclaw.reasoning", {
+                              defaultValue: "支持扩展思考",
+                            })}
+                          </FormLabel>
                           <Switch
+                            id={`openclaw-model-reasoning-${modelKey}`}
                             checked={model.reasoning ?? false}
                             onCheckedChange={(checked) =>
                               handleModelChange(index, "reasoning", checked)
                             }
                           />
-                          <span className="text-xs text-muted-foreground">
-                            {model.reasoning
-                              ? t("openclaw.reasoningOn", {
-                                  defaultValue: "启用",
-                                })
-                              : t("openclaw.reasoningOff", {
-                                  defaultValue: "关闭",
-                                })}
-                          </span>
                         </div>
-                      </div>
-                      <div className="flex-1 space-y-1">
-                        <label className="text-xs text-muted-foreground">
-                          {t("openclaw.inputTypes", {
-                            defaultValue: "输入类型",
-                          })}
-                        </label>
-                        {/* "text" is checked by default but can be unchecked —
-                            some models genuinely don't support text input, and
-                            OpenClaw works fine with an empty or image-only array. */}
-                        <div className="flex items-center gap-4 h-9">
+                        <div className="flex items-center gap-3">
+                          <FormLabel>
+                            {t("openclaw.inputTypes", {
+                              defaultValue: "输入类型",
+                            })}
+                          </FormLabel>
                           {(["text", "image"] as const).map((type) => (
                             <label
                               key={type}
-                              className="flex items-center gap-1.5 cursor-pointer select-none"
+                              className="flex cursor-pointer select-none items-center gap-1.5"
                             >
                               <Checkbox
                                 checked={(model.input ?? ["text"]).includes(
@@ -461,7 +432,7 @@ export function OpenClawFormFields({
                                   const current = model.input ?? ["text"];
                                   const next = checked
                                     ? [...new Set([...current, type])]
-                                    : current.filter((v) => v !== type);
+                                    : current.filter((value) => value !== type);
                                   handleModelChange(index, "input", next);
                                 }}
                               />
@@ -470,152 +441,178 @@ export function OpenClawFormFields({
                           ))}
                         </div>
                       </div>
-                      <div className="flex-1" />
-                    </div>
 
-                    {/* Context Window and Max Tokens row */}
-                    <div className="flex items-center gap-2">
-                      <div className="flex-1 space-y-1">
-                        <label className="text-xs text-muted-foreground">
+                      <div className="space-y-1">
+                        <FormLabel
+                          htmlFor={`openclaw-model-context-${modelKey}`}
+                          className="text-xs text-muted-foreground"
+                        >
                           {t("openclaw.contextWindow", {
-                            defaultValue: "上下文窗口",
+                            defaultValue: "上下文长度",
                           })}
-                        </label>
+                        </FormLabel>
                         <Input
+                          id={`openclaw-model-context-${modelKey}`}
                           type="number"
+                          min={1}
+                          step={1}
                           value={model.contextWindow ?? ""}
-                          onChange={(e) =>
+                          onChange={(event) =>
                             handleModelChange(
                               index,
                               "contextWindow",
-                              e.target.value
-                                ? parseInt(e.target.value)
+                              event.target.value
+                                ? parseInt(event.target.value)
                                 : undefined,
                             )
                           }
                           placeholder="200000"
                         />
                       </div>
-                      <div className="flex-1 space-y-1">
-                        <label className="text-xs text-muted-foreground">
+                      <div className="space-y-1">
+                        <FormLabel
+                          htmlFor={`openclaw-model-max-tokens-${modelKey}`}
+                          className="text-xs text-muted-foreground"
+                        >
                           {t("openclaw.maxTokens", {
-                            defaultValue: "最大输出 Tokens",
+                            defaultValue: "最大输出 Token 数",
                           })}
-                        </label>
+                        </FormLabel>
                         <Input
+                          id={`openclaw-model-max-tokens-${modelKey}`}
                           type="number"
+                          min={1}
+                          step={1}
                           value={model.maxTokens ?? ""}
-                          onChange={(e) =>
+                          onChange={(event) =>
                             handleModelChange(
                               index,
                               "maxTokens",
-                              e.target.value
-                                ? parseInt(e.target.value)
+                              event.target.value
+                                ? parseInt(event.target.value)
                                 : undefined,
                             )
                           }
                           placeholder="32000"
                         />
                       </div>
-                      <div className="flex-1" />
-                    </div>
 
-                    {/* Cost row */}
-                    <div className="flex items-center gap-2">
-                      <div className="flex-1 space-y-1">
-                        <label className="text-xs text-muted-foreground">
-                          {t("openclaw.inputCost", {
-                            defaultValue: "输入价格 ($/M tokens)",
+                      <div className="space-y-2 sm:col-span-2">
+                        <span className="text-xs font-medium text-muted-foreground">
+                          {t("openclaw.modelCost", {
+                            defaultValue: "成本（$/百万 Token）",
                           })}
-                        </label>
-                        <Input
-                          type="number"
-                          step="0.001"
-                          value={model.cost?.input ?? ""}
-                          onChange={(e) =>
-                            handleCostChange(index, "input", e.target.value)
-                          }
-                          placeholder="3"
-                        />
+                        </span>
+                        <div className="grid gap-2 sm:grid-cols-2">
+                          <div className="space-y-1">
+                            <FormLabel
+                              htmlFor={`openclaw-model-input-cost-${modelKey}`}
+                              className="text-xs text-muted-foreground"
+                            >
+                              {t("openclaw.inputCost", {
+                                defaultValue: "输入",
+                              })}
+                            </FormLabel>
+                            <Input
+                              id={`openclaw-model-input-cost-${modelKey}`}
+                              type="number"
+                              min={0}
+                              step="0.001"
+                              value={model.cost?.input ?? ""}
+                              onChange={(event) =>
+                                handleCostChange(
+                                  index,
+                                  "input",
+                                  event.target.value,
+                                )
+                              }
+                              placeholder="3"
+                            />
+                          </div>
+                          <div className="space-y-1">
+                            <FormLabel
+                              htmlFor={`openclaw-model-output-cost-${modelKey}`}
+                              className="text-xs text-muted-foreground"
+                            >
+                              {t("openclaw.outputCost", {
+                                defaultValue: "输出",
+                              })}
+                            </FormLabel>
+                            <Input
+                              id={`openclaw-model-output-cost-${modelKey}`}
+                              type="number"
+                              min={0}
+                              step="0.001"
+                              value={model.cost?.output ?? ""}
+                              onChange={(event) =>
+                                handleCostChange(
+                                  index,
+                                  "output",
+                                  event.target.value,
+                                )
+                              }
+                              placeholder="15"
+                            />
+                          </div>
+                          <div className="space-y-1">
+                            <FormLabel
+                              htmlFor={`openclaw-model-cache-read-${modelKey}`}
+                              className="text-xs text-muted-foreground"
+                            >
+                              {t("openclaw.cacheReadCost", {
+                                defaultValue: "缓存读取",
+                              })}
+                            </FormLabel>
+                            <Input
+                              id={`openclaw-model-cache-read-${modelKey}`}
+                              type="number"
+                              min={0}
+                              step="0.001"
+                              value={model.cost?.cacheRead ?? ""}
+                              onChange={(event) =>
+                                handleCostChange(
+                                  index,
+                                  "cacheRead",
+                                  event.target.value,
+                                )
+                              }
+                              placeholder="0.3"
+                            />
+                          </div>
+                          <div className="space-y-1">
+                            <FormLabel
+                              htmlFor={`openclaw-model-cache-write-${modelKey}`}
+                              className="text-xs text-muted-foreground"
+                            >
+                              {t("openclaw.cacheWriteCost", {
+                                defaultValue: "缓存写入",
+                              })}
+                            </FormLabel>
+                            <Input
+                              id={`openclaw-model-cache-write-${modelKey}`}
+                              type="number"
+                              min={0}
+                              step="0.001"
+                              value={model.cost?.cacheWrite ?? ""}
+                              onChange={(event) =>
+                                handleCostChange(
+                                  index,
+                                  "cacheWrite",
+                                  event.target.value,
+                                )
+                              }
+                              placeholder="3.75"
+                            />
+                          </div>
+                        </div>
                       </div>
-                      <div className="flex-1 space-y-1">
-                        <label className="text-xs text-muted-foreground">
-                          {t("openclaw.outputCost", {
-                            defaultValue: "输出价格 ($/M tokens)",
-                          })}
-                        </label>
-                        <Input
-                          type="number"
-                          step="0.001"
-                          value={model.cost?.output ?? ""}
-                          onChange={(e) =>
-                            handleCostChange(index, "output", e.target.value)
-                          }
-                          placeholder="15"
-                        />
-                      </div>
-                      <div className="flex-1" />
                     </div>
-
-                    {/* Cache Cost row */}
-                    <div className="flex items-center gap-2">
-                      <div className="flex-1 space-y-1">
-                        <label className="text-xs text-muted-foreground">
-                          {t("openclaw.cacheReadCost", {
-                            defaultValue: "缓存读取价格 ($/M tokens)",
-                          })}
-                        </label>
-                        <Input
-                          type="number"
-                          step="0.001"
-                          value={model.cost?.cacheRead ?? ""}
-                          onChange={(e) =>
-                            handleCostChange(index, "cacheRead", e.target.value)
-                          }
-                          placeholder="0.3"
-                        />
-                      </div>
-                      <div className="flex-1 space-y-1">
-                        <label className="text-xs text-muted-foreground">
-                          {t("openclaw.cacheWriteCost", {
-                            defaultValue: "缓存写入价格 ($/M tokens)",
-                          })}
-                        </label>
-                        <Input
-                          type="number"
-                          step="0.001"
-                          value={model.cost?.cacheWrite ?? ""}
-                          onChange={(e) =>
-                            handleCostChange(
-                              index,
-                              "cacheWrite",
-                              e.target.value,
-                            )
-                          }
-                          placeholder="3.75"
-                        />
-                      </div>
-                      <div className="flex-1" />
-                    </div>
-                    <p className="text-xs text-muted-foreground">
-                      {t("openclaw.cacheCostHint", {
-                        defaultValue:
-                          "缓存价格用于计算 Prompt Caching 的成本。如不使用缓存可留空。",
-                      })}
-                    </p>
-                  </CollapsibleContent>
-                </Collapsible>
-              </div>
-            ))}
+                  )}
+                </div>
+              );
+            })}
           </div>
         )}
-
-        <p className="text-xs text-muted-foreground">
-          {t("openclaw.modelsHint", {
-            defaultValue:
-              "配置该供应商支持的模型。第一个模型为默认模型（Primary），其余为回退模型（Fallback）。拖拽或调整顺序可更改默认模型。",
-          })}
-        </p>
       </div>
     </>
   );
diff --git a/src/hooks/useProviderActions.ts b/src/hooks/useProviderActions.ts
index bd3fd74b9..9187fb130 100644
--- a/src/hooks/useProviderActions.ts
+++ b/src/hooks/useProviderActions.ts
@@ -394,7 +394,7 @@ export function useProviderActions(
 
   // Set provider as default model (OpenClaw only)
   const setAsDefaultModel = useCallback(
-    async (provider: Provider) => {
+    async (provider: Provider, modelId?: string) => {
       const config = provider.settingsConfig as OpenClawProviderConfig;
       if (!config.models || config.models.length === 0) {
         toast.error(
@@ -405,12 +405,31 @@ export function useProviderActions(
         return;
       }
 
-      const model: OpenClawDefaultModel = {
-        primary: `${provider.id}/${config.models[0].id}`,
-        fallbacks: config.models.slice(1).map((m) => `${provider.id}/${m.id}`),
-      };
+      const selectedModel = modelId
+        ? config.models.find((model) => model.id === modelId)
+        : config.models[0];
+      if (!selectedModel) {
+        toast.error(
+          t("notifications.openclawModelNotFound", {
+            defaultValue: "所选模型已不存在，请刷新后重试",
+          }),
+        );
+        return;
+      }
 
       try {
+        const primary = `${provider.id}/${selectedModel.id}`;
+        const existingDefault = await openclawApi.getDefaultModel();
+        const model: OpenClawDefaultModel = {
+          ...(existingDefault ?? {}),
+          primary,
+        };
+        if (existingDefault?.fallbacks) {
+          model.fallbacks = existingDefault.fallbacks.filter(
+            (fallback) => fallback !== primary,
+          );
+        }
+
         await openclawApi.setDefaultModel(model);
         await queryClient.invalidateQueries({
           queryKey: openclawKeys.defaultModel,
diff --git a/src/i18n/locales/en.json b/src/i18n/locales/en.json
index fe9c8a29b..2a11a9db8 100644
--- a/src/i18n/locales/en.json
+++ b/src/i18n/locales/en.json
@@ -272,6 +272,7 @@
     "openclawDefaultModelSet": "Set as default model",
     "openclawDefaultModelSetFailed": "Failed to set default model",
     "openclawNoModels": "No models configured",
+    "openclawModelNotFound": "The selected model no longer exists. Refresh and try again.",
     "backfillWarning": "Switched successfully, but failed to save changes back to the previous provider",
     "windowControlFailed": "Window control failed: {{error}}",
     "officialBlockedByProxy": "Cannot switch to official provider while local routing is active. Using routing with official APIs may cause account bans.",
@@ -2080,26 +2081,25 @@
     "apiProtocolHint": "Select the protocol type compatible with the provider's API. Most providers use OpenAI Completions format.",
     "baseUrl": "API Endpoint",
     "baseUrlHint": "The provider's API endpoint address.",
-    "models": "Models",
+    "models": "Model Configuration",
     "addModel": "Add Model",
-    "noModels": "No models configured. Click Add Model to configure available models.",
+    "selectDefaultModel": "Select Default Model",
+    "noModels": "No models configured",
     "modelId": "Model ID",
     "modelIdPlaceholder": "claude-3-sonnet",
     "modelName": "Display Name",
     "modelNamePlaceholder": "Claude 3 Sonnet",
-    "contextWindow": "Context Window",
+    "toggleModelDetails": "Expand or collapse model details",
+    "removeModel": "Remove model",
+    "contextWindow": "Context Length",
     "maxTokens": "Max Output Tokens",
-    "reasoning": "Reasoning Mode",
-    "reasoningOn": "Enabled",
-    "reasoningOff": "Disabled",
+    "reasoning": "Supports Extended Thinking",
     "inputTypes": "Input Types",
-    "inputCost": "Input Cost ($/M tokens)",
-    "outputCost": "Output Cost ($/M tokens)",
-    "advancedOptions": "Advanced Options",
-    "cacheReadCost": "Cache Read Cost ($/M tokens)",
-    "cacheWriteCost": "Cache Write Cost ($/M tokens)",
-    "cacheCostHint": "Cache costs are used to calculate Prompt Caching costs. Leave empty if not using caching.",
-    "modelsHint": "Configure the models supported by this provider. Model ID is used for API calls, Display Name for the interface.",
+    "modelCost": "Cost ($/million tokens)",
+    "inputCost": "Input",
+    "outputCost": "Output",
+    "cacheReadCost": "Cache Read",
+    "cacheWriteCost": "Cache Write",
     "userAgent": "Send User-Agent",
     "userAgentHint": "Some providers require a browser User-Agent header to work properly.",
     "env": {
@@ -2168,9 +2168,7 @@
       "stringifiedEnvVars": "env.vars should be an object, but the current value looks stringified or malformed.",
       "stringifiedShellEnv": "env.shellEnv should be an object, but the current value looks stringified or malformed.",
       "parseFailed": "openclaw.json could not be parsed as valid JSON5. Fix the file before editing it here."
-    },
-    "primaryModel": "Primary Model",
-    "fallbackModel": "Fallback Model"
+    }
   },
   "hermes": {
     "form": {
diff --git a/src/i18n/locales/ja.json b/src/i18n/locales/ja.json
index 25774a0a5..942e42c58 100644
--- a/src/i18n/locales/ja.json
+++ b/src/i18n/locales/ja.json
@@ -272,6 +272,7 @@
     "openclawDefaultModelSet": "デフォルトモデルに設定しました",
     "openclawDefaultModelSetFailed": "デフォルトモデルの設定に失敗しました",
     "openclawNoModels": "モデルが設定されていません",
+    "openclawModelNotFound": "選択したモデルは存在しません。更新してからもう一度お試しください。",
     "backfillWarning": "切り替え成功しましたが、前のプロバイダーへの設定保存に失敗しました",
     "windowControlFailed": "ウィンドウ操作に失敗しました: {{error}}",
     "officialBlockedByProxy": "ローカルルーティングモード中は公式プロバイダーに切り替えできません。ルーティング経由で公式 API にアクセスするとアカウントが停止される可能性があります。",
@@ -2080,26 +2081,25 @@
     "apiProtocolHint": "プロバイダーの API と互換性のあるプロトコルタイプを選択してください。ほとんどのプロバイダーは OpenAI Completions 形式を使用します。",
     "baseUrl": "API エンドポイント",
     "baseUrlHint": "プロバイダーの API エンドポイントアドレス。",
-    "models": "モデル一覧",
+    "models": "モデル設定",
     "addModel": "モデルを追加",
-    "noModels": "モデルが設定されていません。「モデルを追加」をクリックして利用可能なモデルを設定してください。",
+    "selectDefaultModel": "デフォルトモデルを選択",
+    "noModels": "モデルが設定されていません",
     "modelId": "モデル ID",
     "modelIdPlaceholder": "claude-3-sonnet",
     "modelName": "表示名",
     "modelNamePlaceholder": "Claude 3 Sonnet",
-    "contextWindow": "コンテキストウィンドウ",
+    "toggleModelDetails": "モデル詳細を展開または折りたたむ",
+    "removeModel": "モデルを削除",
+    "contextWindow": "コンテキスト長",
     "maxTokens": "最大出力トークン数",
-    "reasoning": "推論モード",
-    "reasoningOn": "有効",
-    "reasoningOff": "無効",
+    "reasoning": "拡張思考に対応",
     "inputTypes": "入力タイプ",
-    "inputCost": "入力コスト ($/M トークン)",
-    "outputCost": "出力コスト ($/M トークン)",
-    "advancedOptions": "詳細オプション",
-    "cacheReadCost": "キャッシュ読取コスト ($/M トークン)",
-    "cacheWriteCost": "キャッシュ書込コスト ($/M トークン)",
-    "cacheCostHint": "キャッシュコストは Prompt Caching のコスト計算に使用されます。キャッシュを使用しない場合は空欄のままにしてください。",
-    "modelsHint": "このプロバイダーがサポートするモデルを設定します。モデル ID は API 呼び出しに、表示名はインターフェースに使用されます。",
+    "modelCost": "コスト（$/100万トークン）",
+    "inputCost": "入力",
+    "outputCost": "出力",
+    "cacheReadCost": "キャッシュ読み取り",
+    "cacheWriteCost": "キャッシュ書き込み",
     "userAgent": "User-Agent を送信",
     "userAgentHint": "一部のプロバイダーはブラウザの User-Agent ヘッダーが必要です。",
     "env": {
@@ -2168,9 +2168,7 @@
       "stringifiedEnvVars": "env.vars はオブジェクトである必要がありますが、現在の値は文字列化または破損しているようです。",
       "stringifiedShellEnv": "env.shellEnv はオブジェクトである必要がありますが、現在の値は文字列化または破損しているようです。",
       "parseFailed": "openclaw.json を有効な JSON5 として解析できませんでした。ここで編集する前にファイルを修正してください。"
-    },
-    "primaryModel": "プライマリモデル",
-    "fallbackModel": "フォールバックモデル"
+    }
   },
   "hermes": {
     "form": {
diff --git a/src/i18n/locales/zh-TW.json b/src/i18n/locales/zh-TW.json
index 341cf81de..17a3eb14e 100644
--- a/src/i18n/locales/zh-TW.json
+++ b/src/i18n/locales/zh-TW.json
@@ -272,6 +272,7 @@
     "openclawDefaultModelSet": "已設為預設模型",
     "openclawDefaultModelSetFailed": "設定預設模型失敗",
     "openclawNoModels": "該供應商沒有設定模型",
+    "openclawModelNotFound": "所選模型已不存在，請重新整理後再試",
     "backfillWarning": "切換成功，但舊供應商設定回填失敗，您手動修改的設定可能未儲存",
     "windowControlFailed": "視窗控制失敗：{{error}}",
     "officialBlockedByProxy": "本地路由模式下不能切換至官方供應商，使用路由存取官方 API 可能導致帳號被封鎖",
@@ -2081,26 +2082,25 @@
     "apiProtocolHint": "選擇與供應商 API 相容的協定類型。大多數供應商使用 OpenAI Completions 格式。",
     "baseUrl": "API 端點",
     "baseUrlHint": "供應商的 API 端點位址。",
-    "models": "模型清單",
+    "models": "模型設定",
     "addModel": "新增模型",
-    "noModels": "暫無模型設定。點擊新增模型來設定可用模型。",
+    "selectDefaultModel": "選擇預設模型",
+    "noModels": "暫無模型設定",
     "modelId": "模型 ID",
     "modelIdPlaceholder": "claude-3-sonnet",
     "modelName": "顯示名稱",
     "modelNamePlaceholder": "Claude 3 Sonnet",
-    "contextWindow": "上下文視窗",
-    "maxTokens": "最大輸出 Tokens",
-    "reasoning": "推理模式",
-    "reasoningOn": "啟用",
-    "reasoningOff": "關閉",
+    "toggleModelDetails": "展開或收合模型詳情",
+    "removeModel": "移除模型",
+    "contextWindow": "上下文長度",
+    "maxTokens": "最大輸出 Token 數",
+    "reasoning": "支援擴展思考",
     "inputTypes": "輸入類型",
-    "inputCost": "輸入價格 ($/M tokens)",
-    "outputCost": "輸出價格 ($/M tokens)",
-    "advancedOptions": "進階選項",
-    "cacheReadCost": "快取讀取價格 ($/M tokens)",
-    "cacheWriteCost": "快取寫入價格 ($/M tokens)",
-    "cacheCostHint": "快取價格用於計算 Prompt Caching 的成本。如不使用快取可留空。",
-    "modelsHint": "設定該供應商支援的模型。模型 ID 用於 API 呼叫，顯示名稱用於介面展示。",
+    "modelCost": "成本（$/百萬 Token）",
+    "inputCost": "輸入",
+    "outputCost": "輸出",
+    "cacheReadCost": "快取讀取",
+    "cacheWriteCost": "快取寫入",
     "userAgent": "發送 User-Agent",
     "userAgentHint": "部分供應商需要瀏覽器 User-Agent 才能正常存取。",
     "env": {
@@ -2169,9 +2169,7 @@
       "stringifiedEnvVars": "env.vars 應為物件，但目前值看起來像被字串化或已損壞。",
       "stringifiedShellEnv": "env.shellEnv 應為物件，但目前值看起來像被字串化或已損壞。",
       "parseFailed": "openclaw.json 不是合法 JSON5。請先修復檔案，再透過這裡編輯。"
-    },
-    "primaryModel": "預設模型",
-    "fallbackModel": "備用模型"
+    }
   },
   "hermes": {
     "form": {
diff --git a/src/i18n/locales/zh.json b/src/i18n/locales/zh.json
index 1dfec0074..990d69ecc 100644
--- a/src/i18n/locales/zh.json
+++ b/src/i18n/locales/zh.json
@@ -272,6 +272,7 @@
     "openclawDefaultModelSet": "已设为默认模型",
     "openclawDefaultModelSetFailed": "设置默认模型失败",
     "openclawNoModels": "该供应商没有配置模型",
+    "openclawModelNotFound": "所选模型已不存在，请刷新后重试",
     "backfillWarning": "切换成功，但旧供应商配置回填失败，您手动修改的配置可能未保存",
     "windowControlFailed": "窗口控制失败：{{error}}",
     "officialBlockedByProxy": "本地路由模式下不能切换到官方供应商，使用路由访问官方 API 可能导致账号被封禁",
@@ -2080,26 +2081,25 @@
     "apiProtocolHint": "选择与供应商 API 兼容的协议类型。大多数供应商使用 OpenAI Completions 格式。",
     "baseUrl": "API 端点",
     "baseUrlHint": "供应商的 API 端点地址。",
-    "models": "模型列表",
+    "models": "模型配置",
     "addModel": "添加模型",
-    "noModels": "暂无模型配置。点击添加模型来配置可用模型。",
+    "selectDefaultModel": "选择默认模型",
+    "noModels": "暂无模型配置",
     "modelId": "模型 ID",
     "modelIdPlaceholder": "claude-3-sonnet",
     "modelName": "显示名称",
     "modelNamePlaceholder": "Claude 3 Sonnet",
-    "contextWindow": "上下文窗口",
-    "maxTokens": "最大输出 Tokens",
-    "reasoning": "推理模式",
-    "reasoningOn": "启用",
-    "reasoningOff": "关闭",
+    "toggleModelDetails": "展开或收起模型详情",
+    "removeModel": "移除模型",
+    "contextWindow": "上下文长度",
+    "maxTokens": "最大输出 Token 数",
+    "reasoning": "支持扩展思考",
     "inputTypes": "输入类型",
-    "inputCost": "输入价格 ($/M tokens)",
-    "outputCost": "输出价格 ($/M tokens)",
-    "advancedOptions": "高级选项",
-    "cacheReadCost": "缓存读取价格 ($/M tokens)",
-    "cacheWriteCost": "缓存写入价格 ($/M tokens)",
-    "cacheCostHint": "缓存价格用于计算 Prompt Caching 的成本。如不使用缓存可留空。",
-    "modelsHint": "配置该供应商支持的模型。模型 ID 用于 API 调用，显示名称用于界面展示。",
+    "modelCost": "成本（$/百万 Token）",
+    "inputCost": "输入",
+    "outputCost": "输出",
+    "cacheReadCost": "缓存读取",
+    "cacheWriteCost": "缓存写入",
     "userAgent": "发送 User-Agent",
     "userAgentHint": "部分供应商需要浏览器 User-Agent 才能正常访问。",
     "env": {
@@ -2168,9 +2168,7 @@
       "stringifiedEnvVars": "env.vars 应为对象，但当前值看起来像被字符串化或已损坏。",
       "stringifiedShellEnv": "env.shellEnv 应为对象，但当前值看起来像被字符串化或已损坏。",
       "parseFailed": "openclaw.json 不是合法 JSON5。请先修复文件，再通过这里编辑。"
-    },
-    "primaryModel": "默认模型",
-    "fallbackModel": "回退模型"
+    }
   },
   "hermes": {
     "form": {
diff --git a/tests/components/OpenClawFormFields.test.tsx b/tests/components/OpenClawFormFields.test.tsx
new file mode 100644
index 000000000..38e77c5b8
--- /dev/null
+++ b/tests/components/OpenClawFormFields.test.tsx
@@ -0,0 +1,84 @@
+import { render, screen } from "@testing-library/react";
+import userEvent from "@testing-library/user-event";
+import { describe, expect, it, vi } from "vitest";
+import { FormProvider, useForm } from "react-hook-form";
+import { OpenClawFormFields } from "@/components/providers/forms/OpenClawFormFields";
+
+const models = [
+  {
+    id: "gpt-5.6-sol",
+    name: "GPT-5.6 Sol",
+    reasoning: true,
+    input: ["text", "image"],
+    contextWindow: 272000,
+    maxTokens: 128000,
+    cost: {
+      input: 2.5,
+      output: 15,
+      cacheRead: 0.25,
+      cacheWrite: 3.125,
+    },
+  },
+  {
+    id: "gpt-5.6-luna",
+    name: "GPT-5.6 Luna",
+    input: ["text"],
+  },
+];
+
+function renderForm() {
+  const onModelsChange = vi.fn();
+  function TestForm() {
+    const form = useForm();
+    return (
+      <FormProvider {...form}>
+        <OpenClawFormFields
+          baseUrl="https://api.example.com/v1"
+          onBaseUrlChange={vi.fn()}
+          apiKey="test-key"
+          onApiKeyChange={vi.fn()}
+          shouldShowApiKeyLink={false}
+          websiteUrl=""
+          api="openai-responses"
+          onApiChange={vi.fn()}
+          models={models}
+          onModelsChange={onModelsChange}
+          userAgent={false}
+          onUserAgentChange={vi.fn()}
+        />
+      </FormProvider>
+    );
+  }
+  render(<TestForm />);
+  return { onModelsChange };
+}
+
+describe("OpenClawFormFields model editor", () => {
+  it("uses the family model-row layout without inferred model roles", () => {
+    renderForm();
+
+    expect(screen.getByText("模型配置")).toBeInTheDocument();
+    expect(screen.getAllByText("模型 ID")).toHaveLength(1);
+    expect(screen.getAllByText("显示名称")).toHaveLength(1);
+    expect(screen.queryByText("默认模型")).not.toBeInTheDocument();
+    expect(screen.queryByText("回退模型")).not.toBeInTheDocument();
+    expect(screen.getByDisplayValue("gpt-5.6-sol")).toBeInTheDocument();
+    expect(screen.getByDisplayValue("GPT-5.6 Luna")).toBeInTheDocument();
+  });
+
+  it("reveals native OpenClaw model details from the row chevron", async () => {
+    const user = userEvent.setup();
+    renderForm();
+
+    const toggles = screen.getAllByRole("button", {
+      name: "展开或收起模型详情",
+    });
+    await user.click(toggles[0]);
+
+    expect(screen.getByText("支持扩展思考")).toBeInTheDocument();
+    expect(screen.getByText("输入类型")).toBeInTheDocument();
+    expect(screen.getByText("上下文长度")).toBeInTheDocument();
+    expect(screen.getByText("最大输出 Token 数")).toBeInTheDocument();
+    expect(screen.getByText("成本（$/百万 Token）")).toBeInTheDocument();
+  });
+});
diff --git a/tests/components/OpenClawProviderActions.test.tsx b/tests/components/OpenClawProviderActions.test.tsx
new file mode 100644
index 000000000..338e30b3e
--- /dev/null
+++ b/tests/components/OpenClawProviderActions.test.tsx
@@ -0,0 +1,58 @@
+import { render, screen } from "@testing-library/react";
+import userEvent from "@testing-library/user-event";
+import { describe, expect, it, vi } from "vitest";
+import { ProviderActions } from "@/components/providers/ProviderActions";
+
+describe("ProviderActions OpenClaw default model selection", () => {
+  it("asks which model to use when a provider has multiple models", async () => {
+    const user = userEvent.setup();
+    const onSetAsDefault = vi.fn();
+
+    render(
+      <ProviderActions
+        appId="openclaw"
+        isCurrent={false}
+        isInConfig
+        isDefaultModel={false}
+        defaultModelOptions={[
+          { id: "gpt-5.6-sol", name: "GPT-5.6 Sol" },
+          { id: "gpt-5.6-luna", name: "GPT-5.6 Luna" },
+        ]}
+        onSwitch={vi.fn()}
+        onEdit={vi.fn()}
+        onDuplicate={vi.fn()}
+        onDelete={vi.fn()}
+        onSetAsDefault={onSetAsDefault}
+      />,
+    );
+
+    await user.click(screen.getByRole("button", { name: /设为默认/ }));
+    await user.click(screen.getByText("GPT-5.6 Luna"));
+
+    expect(onSetAsDefault).toHaveBeenCalledWith("gpt-5.6-luna");
+  });
+
+  it("uses the only configured model without opening a picker", async () => {
+    const user = userEvent.setup();
+    const onSetAsDefault = vi.fn();
+
+    render(
+      <ProviderActions
+        appId="openclaw"
+        isCurrent={false}
+        isInConfig
+        isDefaultModel={false}
+        defaultModelOptions={[{ id: "claude-opus-5", name: "Claude Opus 5" }]}
+        onSwitch={vi.fn()}
+        onEdit={vi.fn()}
+        onDuplicate={vi.fn()}
+        onDelete={vi.fn()}
+        onSetAsDefault={onSetAsDefault}
+      />,
+    );
+
+    await user.click(screen.getByRole("button", { name: "设为默认" }));
+
+    expect(onSetAsDefault).toHaveBeenCalledWith("claude-opus-5");
+  });
+});
diff --git a/tests/hooks/useProviderActions.test.tsx b/tests/hooks/useProviderActions.test.tsx
index 252d06fac..e1a76e004 100644
--- a/tests/hooks/useProviderActions.test.tsx
+++ b/tests/hooks/useProviderActions.test.tsx
@@ -720,7 +720,7 @@ describe("useProviderActions", () => {
     expect(result.current.isLoading).toBe(true);
   });
 
-  it("does not show backup details when setting OpenClaw default model", async () => {
+  it("sets the first OpenClaw model without inventing a fallback chain", async () => {
     openclawApiSetDefaultModelMock.mockResolvedValueOnce({
       backupPath: "/tmp/openclaw-backup.json5",
       warnings: [],
@@ -743,11 +743,42 @@ describe("useProviderActions", () => {
 
     expect(openclawApiSetDefaultModelMock).toHaveBeenCalledWith({
       primary: "provider-1/gpt-4.1",
-      fallbacks: ["provider-1/gpt-4.1-mini"],
     });
     expect(toastSuccessMock).toHaveBeenCalledTimes(1);
     expect(toastSuccessMock.mock.calls[0]?.[1]).toEqual({ closeButton: true });
   });
+
+  it("sets the explicitly selected OpenClaw model and preserves existing fallbacks", async () => {
+    openclawApiGetDefaultModelMock.mockResolvedValueOnce({
+      primary: "other/old-primary",
+      fallbacks: ["provider-1/gpt-4.1-mini", "other/fallback"],
+      customPolicy: "preserve-me",
+    });
+    openclawApiSetDefaultModelMock.mockResolvedValueOnce({
+      warnings: [],
+    });
+
+    const { wrapper } = createWrapper();
+    const provider = createProvider({
+      settingsConfig: {
+        models: [{ id: "gpt-4.1" }, { id: "gpt-4.1-mini" }],
+      },
+    });
+
+    const { result } = renderHook(() => useProviderActions("openclaw"), {
+      wrapper,
+    });
+
+    await act(async () => {
+      await result.current.setAsDefaultModel(provider, "gpt-4.1-mini");
+    });
+
+    expect(openclawApiSetDefaultModelMock).toHaveBeenCalledWith({
+      primary: "provider-1/gpt-4.1-mini",
+      fallbacks: ["other/fallback"],
+      customPolicy: "preserve-me",
+    });
+  });
 });
 it("clears loading flag when all mutations idle", () => {
   addProviderMutation.isPending = false;