fix(openai): include 'user' param for responses API models #17648
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The 'user' parameter was being ignored when using responses API models (e.g., model="openai/responses/gpt-4.1") because the model name check in get_supported_openai_params() didn't account for the "responses/" prefix. Fix: Normalize the model name by stripping "responses/" prefix before checking if the model is in the list of supported OpenAI models. This is a minimal, non-breaking change that: - Adds 2 lines of code in gpt_transformation.py - Only affects the parameter support check, not the model variable itself - Includes unit and integration tests
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Title
fix(openai): include 'user' param for responses API models
Relevant issues
Fixes #17633
Pre-Submission checklist
tests/litellm/directorymake test-unitType
🐛 Bug Fix
Changes
The
userparam was being ignored for responses API models (e.g.,model="openai/responses/gpt-4.1") because the check inget_supported_openai_params()was failing -"responses/gpt-4.1"doesn't match"gpt-4.1"in the models list.Fix: Take out the
responses/prefix before checking if it's in the supported models list.Tests added: 7 unit/integration tests in
tests/test_litellm/llms/openai/chat/test_openai_gpt_transformation.py