diff --git a/apps/cli/src/ai/chat-command.test.ts b/apps/cli/src/ai/chat-command.test.ts
index e7610025..965b8ad2 100644
--- a/apps/cli/src/ai/chat-command.test.ts
+++ b/apps/cli/src/ai/chat-command.test.ts
@@ -156,7 +156,7 @@ describe('runChatTurn', () => {
           onEvent({
             type: 'done',
             isFinished: true,
-            usage: { promptTokens: 1, completionTokens: 1, totalTokens: 2 },
+            usage: { promptTokens: 1, completionTokens: 1, totalTokens: 2, cacheReadTokens: 0, cacheWriteTokens: 0 },
           })
         },
       }
@@ -174,7 +174,7 @@ describe('runChatTurn', () => {
         aiChatId: 'ai_chat_1',
         role: 'assistant',
         content: 'hi',
-        tokenUsage: { promptTokens: 1, completionTokens: 1, totalTokens: 2 },
+        tokenUsage: { promptTokens: 1, completionTokens: 1, totalTokens: 2, cacheReadTokens: 0, cacheWriteTokens: 0 },
       },
     ])
   })
@@ -222,7 +222,7 @@ describe('runChatTurn', () => {
           onEvent({
             type: 'done',
             isFinished: true,
-            usage: { promptTokens: 3, completionTokens: 5, totalTokens: 8 },
+            usage: { promptTokens: 3, completionTokens: 5, totalTokens: 8, cacheReadTokens: 0, cacheWriteTokens: 0 },
           })
         },
       }
@@ -248,7 +248,7 @@ describe('runChatTurn', () => {
         role: 'assistant',
         content: '年度趋势如下。',
         contentBlocks: result.contentBlocks,
-        tokenUsage: { promptTokens: 3, completionTokens: 5, totalTokens: 8 },
+        tokenUsage: { promptTokens: 3, completionTokens: 5, totalTokens: 8, cacheReadTokens: 0, cacheWriteTokens: 0 },
       },
     ])
   })
@@ -316,7 +316,7 @@ describe('runChatTurn', () => {
           onEvent({
             type: 'done',
             isFinished: true,
-            usage: { promptTokens: 3, completionTokens: 5, totalTokens: 8 },
+            usage: { promptTokens: 3, completionTokens: 5, totalTokens: 8, cacheReadTokens: 0, cacheWriteTokens: 0 },
           })
         },
       }
@@ -347,7 +347,7 @@ describe('runChatTurn', () => {
         role: 'assistant',
         content: '年度趋势如下。',
         contentBlocks: result.contentBlocks,
-        tokenUsage: { promptTokens: 3, completionTokens: 5, totalTokens: 8 },
+        tokenUsage: { promptTokens: 3, completionTokens: 5, totalTokens: 8, cacheReadTokens: 0, cacheWriteTokens: 0 },
       },
     ])
   })
@@ -411,7 +411,7 @@ describe('runChatTurn', () => {
           onEvent({
             type: 'done',
             isFinished: true,
-            usage: { promptTokens: 3, completionTokens: 5, totalTokens: 8 },
+            usage: { promptTokens: 3, completionTokens: 5, totalTokens: 8, cacheReadTokens: 0, cacheWriteTokens: 0 },
           })
         },
       }
@@ -429,7 +429,7 @@ describe('runChatTurn', () => {
       role: 'assistant',
       content: '2026-Q1 是峰值。',
       contentBlocks: result.contentBlocks,
-      tokenUsage: { promptTokens: 3, completionTokens: 5, totalTokens: 8 },
+      tokenUsage: { promptTokens: 3, completionTokens: 5, totalTokens: 8, cacheReadTokens: 0, cacheWriteTokens: 0 },
     })
   })
 
diff --git a/apps/desktop/main/ai/agent-stream-runner.ts b/apps/desktop/main/ai/agent-stream-runner.ts
index 69d834ea..2c4202d1 100644
--- a/apps/desktop/main/ai/agent-stream-runner.ts
+++ b/apps/desktop/main/ai/agent-stream-runner.ts
@@ -125,7 +125,7 @@ export function createElectronRunAgentStream(): (
                 round: 0,
                 toolsUsed: 0,
                 contextTokens: 0,
-                totalUsage: { promptTokens: 0, completionTokens: 0, totalTokens: 0 },
+                totalUsage: { promptTokens: 0, completionTokens: 0, totalTokens: 0, cacheReadTokens: 0, cacheWriteTokens: 0 },
                 updatedAt: Date.now(),
               } satisfies AgentRuntimeStatus,
             })
diff --git a/apps/desktop/shared/types.ts b/apps/desktop/shared/types.ts
index b48676c1..a4e38e70 100644
--- a/apps/desktop/shared/types.ts
+++ b/apps/desktop/shared/types.ts
@@ -28,6 +28,8 @@ export interface TokenUsage {
   promptTokens: number
   completionTokens: number
   totalTokens: number
+  cacheReadTokens: number
+  cacheWriteTokens: number
 }
 
 export interface AgentRuntimeStatus {
diff --git a/packages/http-routes/src/routes/web/ai-chats.ts b/packages/http-routes/src/routes/web/ai-chats.ts
index ed75bcb4..4c8ffcce 100644
--- a/packages/http-routes/src/routes/web/ai-chats.ts
+++ b/packages/http-routes/src/routes/web/ai-chats.ts
@@ -50,7 +50,13 @@ export function registerAiChatRoutes(server: FastifyInstance, ctx: HttpRouteCont
       dataKeywords?: string[]
       dataMessageCount?: number
       contentBlocks?: unknown[]
-      tokenUsage?: { promptTokens: number; completionTokens: number; totalTokens: number }
+      tokenUsage?: {
+        promptTokens: number
+        completionTokens: number
+        totalTokens: number
+        cacheReadTokens?: number
+        cacheWriteTokens?: number
+      }
     }
   }>('/_web/ai/chats/:id/messages', async (request) => {
     const { role, content, dataKeywords, dataMessageCount, contentBlocks, tokenUsage } = request.body
@@ -121,7 +127,13 @@ export function registerAiChatRoutes(server: FastifyInstance, ctx: HttpRouteCont
       role: 'user' | 'assistant' | 'summary'
       content: string
       contentBlocks?: unknown[]
-      tokenUsage?: { promptTokens: number; completionTokens: number; totalTokens: number }
+      tokenUsage?: {
+        promptTokens: number
+        completionTokens: number
+        totalTokens: number
+        cacheReadTokens?: number
+        cacheWriteTokens?: number
+      }
     }
   }>('/_web/ai/chats/:id/messages/insert-after', async (request, reply) => {
     const { afterMessageId, role, content, contentBlocks, tokenUsage } = request.body
diff --git a/packages/node-runtime/src/ai/agent/__tests__/event-handler.test.ts b/packages/node-runtime/src/ai/agent/__tests__/event-handler.test.ts
index b27c4bba..05b81bc5 100644
--- a/packages/node-runtime/src/ai/agent/__tests__/event-handler.test.ts
+++ b/packages/node-runtime/src/ai/agent/__tests__/event-handler.test.ts
@@ -64,15 +64,29 @@ describe('AgentEventHandler', () => {
     })
 
     handler.handleCoreEvent(
-      { type: 'usage_update', usage: { promptTokens: 100, completionTokens: 50, totalTokens: 150 } },
+      {
+        type: 'usage_update',
+        usage: { promptTokens: 100, completionTokens: 50, totalTokens: 150, cacheReadTokens: 30, cacheWriteTokens: 10 },
+      },
       []
     )
 
     const usage = handler.cloneUsage()
     assert.equal(usage.totalTokens, 150)
+    assert.equal(usage.cacheReadTokens, 30)
+    assert.equal(usage.cacheWriteTokens, 10)
 
     handler.handleCoreEvent(
-      { type: 'usage_update', usage: { promptTokens: 200, completionTokens: 100, totalTokens: 300 } },
+      {
+        type: 'usage_update',
+        usage: {
+          promptTokens: 200,
+          completionTokens: 100,
+          totalTokens: 300,
+          cacheReadTokens: 60,
+          cacheWriteTokens: 20,
+        },
+      },
       []
     )
     assert.equal(usage.totalTokens, 150, 'clone should be independent')
diff --git a/packages/node-runtime/src/ai/agent/core.ts b/packages/node-runtime/src/ai/agent/core.ts
index b5610212..087815f6 100644
--- a/packages/node-runtime/src/ai/agent/core.ts
+++ b/packages/node-runtime/src/ai/agent/core.ts
@@ -45,7 +45,13 @@ export async function runAgentCore(options: AgentCoreOptions): Promise<AgentCore
 
   const resolvedStreamFn = (options.streamFn ?? defaultStreamSimple) as typeof defaultStreamSimple
 
-  const totalUsage: AgentTokenUsage = { promptTokens: 0, completionTokens: 0, totalTokens: 0 }
+  const totalUsage: AgentTokenUsage = {
+    promptTokens: 0,
+    completionTokens: 0,
+    totalTokens: 0,
+    cacheReadTokens: 0,
+    cacheWriteTokens: 0,
+  }
   const toolsUsed: string[] = []
   let toolRounds = 0
 
@@ -54,6 +60,8 @@ export async function runAgentCore(options: AgentCoreOptions): Promise<AgentCore
     totalUsage.promptTokens += usage.input || 0
     totalUsage.completionTokens += usage.output || 0
     totalUsage.totalTokens += usage.totalTokens || usage.input + usage.output || 0
+    totalUsage.cacheReadTokens += usage.cacheRead || 0
+    totalUsage.cacheWriteTokens += usage.cacheWrite || 0
   }
 
   if (abortSignal?.aborted) {
diff --git a/packages/node-runtime/src/ai/agent/event-handler.ts b/packages/node-runtime/src/ai/agent/event-handler.ts
index 4e8007ee..c8fe0e9f 100644
--- a/packages/node-runtime/src/ai/agent/event-handler.ts
+++ b/packages/node-runtime/src/ai/agent/event-handler.ts
@@ -16,6 +16,8 @@ export interface TokenUsage {
   promptTokens: number
   completionTokens: number
   totalTokens: number
+  cacheReadTokens: number
+  cacheWriteTokens: number
 }
 
 export interface AgentRuntimeStatus {
@@ -143,7 +145,13 @@ export class AgentEventHandler {
   readonly toolsUsed: string[] = []
   toolRounds: number = 0
 
-  private totalUsage: TokenUsage = { promptTokens: 0, completionTokens: 0, totalTokens: 0 }
+  private totalUsage: TokenUsage = {
+    promptTokens: 0,
+    completionTokens: 0,
+    totalTokens: 0,
+    cacheReadTokens: 0,
+    cacheWriteTokens: 0,
+  }
   private lastStatusAt = 0
   private readonly onChunk: (chunk: AgentStreamChunk) => void
   private readonly context: EventHandlerContext
@@ -205,6 +213,8 @@ export class AgentEventHandler {
       promptTokens: this.totalUsage.promptTokens,
       completionTokens: this.totalUsage.completionTokens,
       totalTokens: this.totalUsage.totalTokens,
+      cacheReadTokens: this.totalUsage.cacheReadTokens,
+      cacheWriteTokens: this.totalUsage.cacheWriteTokens,
     }
   }
 
diff --git a/packages/node-runtime/src/ai/agent/types.ts b/packages/node-runtime/src/ai/agent/types.ts
index 81963d7e..a4aeae35 100644
--- a/packages/node-runtime/src/ai/agent/types.ts
+++ b/packages/node-runtime/src/ai/agent/types.ts
@@ -14,6 +14,8 @@ export interface AgentTokenUsage {
   promptTokens: number
   completionTokens: number
   totalTokens: number
+  cacheReadTokens: number
+  cacheWriteTokens: number
 }
 
 export interface SimpleHistoryMessage {
diff --git a/packages/node-runtime/src/ai/chats.ts b/packages/node-runtime/src/ai/chats.ts
index ca8b0993..4520514e 100644
--- a/packages/node-runtime/src/ai/chats.ts
+++ b/packages/node-runtime/src/ai/chats.ts
@@ -59,6 +59,8 @@ export interface TokenUsageData {
   promptTokens: number
   completionTokens: number
   totalTokens: number
+  cacheReadTokens?: number
+  cacheWriteTokens?: number
 }
 
 export interface AIMessage {
@@ -831,13 +833,21 @@ export class AIChatManager {
 
   getAIChatTokenUsage(aiChatId: string): TokenUsageData {
     const rows = this.getActivePathRows(aiChatId)
-    const result: TokenUsageData = { promptTokens: 0, completionTokens: 0, totalTokens: 0 }
+    const result: TokenUsageData = {
+      promptTokens: 0,
+      completionTokens: 0,
+      totalTokens: 0,
+      cacheReadTokens: 0,
+      cacheWriteTokens: 0,
+    }
     for (const row of rows) {
       if (row.tokenUsage) {
         const usage = JSON.parse(row.tokenUsage) as TokenUsageData
         result.promptTokens += usage.promptTokens
         result.completionTokens += usage.completionTokens
         result.totalTokens += usage.totalTokens
+        result.cacheReadTokens! += usage.cacheReadTokens || 0
+        result.cacheWriteTokens! += usage.cacheWriteTokens || 0
       }
     }
     return result
diff --git a/src/components/AIChat/chat/ChatStatusBar.vue b/src/components/AIChat/chat/ChatStatusBar.vue
index 078b4e6e..cce0e5f8 100644
--- a/src/components/AIChat/chat/ChatStatusBar.vue
+++ b/src/components/AIChat/chat/ChatStatusBar.vue
@@ -18,7 +18,7 @@ const layoutStore = useLayoutStore()
 
 // Props
 const props = defineProps<{
-  sessionTokenUsage: { totalTokens: number }
+  sessionTokenUsage: { totalTokens: number; cacheReadTokens: number; cacheWriteTokens: number }
   agentStatus?: AgentRuntimeStatus | null
   currentAIChatId?: string | null
   estimatedContextTokens?: number
@@ -80,6 +80,9 @@ function formatCompactNumber(value: number): string {
 const totalTokenUsageText = computed(() => formatNumber(props.sessionTokenUsage.totalTokens))
 const totalTokenUsageCompactText = computed(() => formatCompactNumber(props.sessionTokenUsage.totalTokens))
 
+const hasCacheData = computed(() => props.sessionTokenUsage.cacheReadTokens > 0)
+const cacheReadText = computed(() => formatCompactNumber(props.sessionTokenUsage.cacheReadTokens))
+
 const contextTokens = computed(() => {
   if (props.agentStatus?.contextTokens) return props.agentStatus.contextTokens
   if (props.estimatedContextTokens && props.estimatedContextTokens > 0) return props.estimatedContextTokens
@@ -338,6 +341,9 @@ const thinkingLevelLabel = computed(() => {
               {{ formatCompactNumber(modelContextWindow) }}
             </div>
             <div>{{ t('ai.chat.statusBar.tokenUsageTitle') }}: {{ totalTokenUsageCompactText }}</div>
+            <div v-if="hasCacheData">
+              {{ t('ai.chat.statusBar.cacheHit') }}: {{ cacheReadText }}
+            </div>
           </div>
         </template>
       </UTooltip>
diff --git a/src/i18n/locales/en-US/ai.json b/src/i18n/locales/en-US/ai.json
index e08b7fdd..4614587e 100644
--- a/src/i18n/locales/en-US/ai.json
+++ b/src/i18n/locales/en-US/ai.json
@@ -215,6 +215,7 @@
         }
       },
       "tokenUsageTitle": "Total token usage",
+      "cacheHit": "Cache hit",
       "export": {
         "label": "Export",
         "title": "Export current conversation"
diff --git a/src/i18n/locales/ja-JP/ai.json b/src/i18n/locales/ja-JP/ai.json
index 6f6ae543..a794f33c 100644
--- a/src/i18n/locales/ja-JP/ai.json
+++ b/src/i18n/locales/ja-JP/ai.json
@@ -215,6 +215,7 @@
         }
       },
       "tokenUsageTitle": "累計 Token 使用量",
+      "cacheHit": "キャッシュヒット",
       "export": {
         "label": "エクスポート",
         "title": "現在のチャットをエクスポート"
diff --git a/src/i18n/locales/zh-CN/ai.json b/src/i18n/locales/zh-CN/ai.json
index d203f23f..0ad13cfe 100644
--- a/src/i18n/locales/zh-CN/ai.json
+++ b/src/i18n/locales/zh-CN/ai.json
@@ -215,6 +215,7 @@
         }
       },
       "tokenUsageTitle": "累计 Token 使用量",
+      "cacheHit": "缓存命中",
       "export": {
         "label": "导出",
         "title": "导出当前对话"
diff --git a/src/i18n/locales/zh-TW/ai.json b/src/i18n/locales/zh-TW/ai.json
index 2cf0a76f..df8eee9e 100644
--- a/src/i18n/locales/zh-TW/ai.json
+++ b/src/i18n/locales/zh-TW/ai.json
@@ -215,6 +215,7 @@
         }
       },
       "tokenUsageTitle": "累計 Token 用量",
+      "cacheHit": "快取命中",
       "export": {
         "label": "匯出",
         "title": "匯出當前對話"
diff --git a/src/services/ai-stream/types.ts b/src/services/ai-stream/types.ts
index ab2fa8c1..c2fe2fe5 100644
--- a/src/services/ai-stream/types.ts
+++ b/src/services/ai-stream/types.ts
@@ -66,6 +66,8 @@ export interface TokenUsage {
   promptTokens: number
   completionTokens: number
   totalTokens: number
+  cacheReadTokens: number
+  cacheWriteTokens: number
 }
 
 export interface AgentRuntimeStatus {
diff --git a/src/services/ai/types.ts b/src/services/ai/types.ts
index 67810998..9b792a93 100644
--- a/src/services/ai/types.ts
+++ b/src/services/ai/types.ts
@@ -36,6 +36,8 @@ export interface TokenUsageData {
   promptTokens: number
   completionTokens: number
   totalTokens: number
+  cacheReadTokens?: number
+  cacheWriteTokens?: number
 }
 
 export interface AIMessage {
diff --git a/src/stores/aiChat.ts b/src/stores/aiChat.ts
index 568b86c3..b7d708f9 100644
--- a/src/stores/aiChat.ts
+++ b/src/stores/aiChat.ts
@@ -211,7 +211,17 @@ export function buildAIChatKey(params: {
 }
 
 function createEmptyTokenUsage(): TokenUsage {
-  return { promptTokens: 0, completionTokens: 0, totalTokens: 0 }
+  return { promptTokens: 0, completionTokens: 0, totalTokens: 0, cacheReadTokens: 0, cacheWriteTokens: 0 }
+}
+
+function toTokenUsage(data: { [K in keyof TokenUsage]?: number }): TokenUsage {
+  return {
+    promptTokens: data.promptTokens ?? 0,
+    completionTokens: data.completionTokens ?? 0,
+    totalTokens: data.totalTokens ?? 0,
+    cacheReadTokens: data.cacheReadTokens ?? 0,
+    cacheWriteTokens: data.cacheWriteTokens ?? 0,
+  }
 }
 
 function normalizeSerializedError(error: unknown): SerializedErrorInfo {
@@ -523,7 +533,7 @@ export const useAIChatStore = defineStore('aiChatRuntime', () => {
         buffer.messages.splice(0, buffer.messages.length, ...history.map((msg) => toRuntimeMessage(msg)))
         buffer.sourceMessages.splice(0, buffer.sourceMessages.length)
         buffer.currentKeywords.splice(0, buffer.currentKeywords.length)
-        buffer.sessionTokenUsage = tokenUsage
+        buffer.sessionTokenUsage = toTokenUsage(tokenUsage)
         buffer.loaded = true
       }
 
@@ -1083,6 +1093,8 @@ export const useAIChatStore = defineStore('aiChatRuntime', () => {
                   promptTokens: state.sessionTokenUsage.promptTokens + chunk.usage.promptTokens,
                   completionTokens: state.sessionTokenUsage.completionTokens + chunk.usage.completionTokens,
                   totalTokens: state.sessionTokenUsage.totalTokens + chunk.usage.totalTokens,
+                  cacheReadTokens: state.sessionTokenUsage.cacheReadTokens + chunk.usage.cacheReadTokens,
+                  cacheWriteTokens: state.sessionTokenUsage.cacheWriteTokens + chunk.usage.cacheWriteTokens,
                 }
               }
               setAgentPhase(state, 'completed', chunk.usage ? { totalUsage: chunk.usage } : undefined)
@@ -1708,7 +1720,7 @@ export const useAIChatStore = defineStore('aiChatRuntime', () => {
         }
       }
 
-      targetBuffer.sessionTokenUsage = await useAIService().getAIChatTokenUsage(state.currentAIChatId!)
+      targetBuffer.sessionTokenUsage = toTokenUsage(await useAIService().getAIChatTokenUsage(state.currentAIChatId!))
       state.sessionTokenUsage = { ...targetBuffer.sessionTokenUsage }
       return { success: true }
     } catch (error) {