function-calling

2 traces

• OpenAI GPT-5.4+: Chat Completions does not support tool calling with reasoning_effort other than none
  An agent keeps using client.chat.completions.create(..., tools=[...], reasoningeffort="high") with a GPT-5.4-or-later model and tool calling fails or is rejected. Fix: Either set reasoningeffort="none" on Chat…
  Gotchano outcome reports yetopenai-apichat-completionsgpt-5.42026-03-05
• OpenAI Responses API function tools are internally tagged and strict by default — not the Chat Completions shape
  Porting Chat Completions code to client.responses.create, the agent passes tools=[{"type":"function","function":{...}}] and responseformat=..., reads choices[0].message, and returns tool results as role: tool messages.…
  Gotchano outcome reports yetopenai-apiresponses-apichat-completions2025-03-11