Add GPT-5.6 Responses API support#134
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Summary
/v1/responsesso reasoning and function tools work together.gpt-5.6-terraas the default.Why
GPT-5.6 Terra rejects function tools combined with
reasoning_efforton/v1/chat/completions. Setting reasoning effort tononeavoids the error by disabling reasoning, but loses the behavior the model was selected for. The Responses API supports reasoning and tools together, so the adapter now uses that endpoint only for official GPT-5.6 requests.User impact
Users can select the GPT-5.6 family and use tools with reasoning enabled. Existing providers, older OpenAI models, configured custom endpoints, and customized provider settings retain their previous behavior.
Validation
git diff --check origin/main...HEADnode test/run.js: 848 passed; one pre-existing repository version check remains (package.json23.3.7 vs newest changelog entry 23.3.6)npm run test:security: 60/60 passed