[pcbeingused333]

Problem

When a model refuses a request (for example with structured outputs), OpenAI puts the explanation in message.refusal and leaves content empty. The OpenAI integration doesn't read refusal:

• non-streamed: _extract_chat_response keeps role, function_call, tool_calls, audio and content, so the generation output is {"role": "assistant", "content": null};
• streamed: _extract_streamed_openai_response only accumulates delta.content (plus function and tool calls), so a streamed refusal is recorded as no output at all.

In Langfuse the refused call then looks like an empty answer.

Changes

• _extract_chat_response adds refusal to the output when the message has one.
• _extract_streamed_openai_response accumulates delta.refusal and returns {"role": "assistant", "refusal": ...} (plus content if any text was streamed), the same shape as the non-streamed output.

Tests

Two unit tests in tests/unit/test_openai.py, built with the openai SDK's ChatCompletionChunk / ChatCompletionMessage: a streamed refusal split over two chunks, and a non-streamed message with refusal. Both fail on main and pass with this change.

• pytest tests/unit/test_openai.py: 39 passed (37 on main).
• pytest tests/unit --continue-on-collection-errors: 690 passed (688 on main). The 2 failures and 24 collection errors are the same on main (optional dependencies such as langchain are not installed in this environment).
• ruff format, ruff check and mypy langfuse/openai.py: clean.

---

This change was written with Claude Code; the tests and checks above were run before opening the PR.

Confidence Score: 4/5

The refusal changes appear sound, but the two imports must move to module level to satisfy the repository rule before merging.

Summary

The PR records OpenAI refusal text in chat completion outputs.

• OpenAI chat refusals appear in Langfuse generation output.

_{Reviews (1) · Last reviewed commit: "fix(openai): record refusals in chat com..." · Reviewed by Greptile}

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