cc-switch

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Jim Northrup 4c8334c6fd fix: Don't add ?beta=true to OpenAI Chat Completions endpoints (#1052 )

Fixes Nvidia provider and other providers using apiFormat="openai_chat".

The ClaudeAdapter::build_url() method was incorrectly adding ?beta=true
to both /v1/messages and /v1/chat/completions endpoints. This caused
the Nvidia provider to fail because:

1. Nvidia uses apiFormat="openai_chat"
2. Requests are transformed to OpenAI format and sent to /v1/chat/completions
3. The URL gets ?beta=true appended (Anthropic-specific parameter)
4. Nvidia's API rejects requests with this parameter

Fix:
- Only add ?beta=true to /v1/messages endpoint
- Exclude /v1/chat/completions from getting this parameter

Tested:
- Anthropic /v1/messages still gets ?beta=true ✓
- OpenAI Chat Completions /v1/chat/completions does NOT get ?beta=true ✓
- All 13 Claude adapter tests pass ✓

Co-authored-by: jnorthrup <jnorthrup@example.com>

2026-02-16 22:53:08 +08:00