Fix: add stop param as supported for openai and azure

[Sameerlite]

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Type

🐛 Bug Fix

Changes

config:

model_list:
  - model_name: gpt-4.1-2025-04-14
    litellm_params:
      model: azure/gpt-4.1-2025-04-14
      store: true
  - model_name: gpt-4o  
    litellm_params:  
      model: openai/gpt-4o  
      api_key: os.environ/OPENAI_API_KEY  
      store: true 

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Project	Deployment	Actions	Updated (UTC)
litellm	Ready	Preview, Comment	Feb 19, 2026 5:58am

[greptile-apps]

Greptile Summary

This PR attempts to fix parameter handling for the store parameter (not stop as the title suggests) by moving it from the global OPENAI_CHAT_COMPLETION_PARAMS list to provider-specific supported parameter lists in OpenAI and Azure configs.

Key Issues

• Critical: Removing store from OPENAI_CHAT_COMPLETION_PARAMS breaks the existing test test_store_in_openai_chat_completion_params() added in PR fix: add store to OPENAI_CHAT_COMPLETION_PARAMS #21195, which explicitly asserts "store" in OPENAI_CHAT_COMPLETION_PARAMS
• Critical: The function get_standard_openai_params() in litellm/utils.py:9042 relies on OPENAI_CHAT_COMPLETION_PARAMS to filter standard OpenAI parameters. Removing store from this list will cause it to be excluded from OpenAI/Azure API calls, breaking the functionality that PR fix: add store to OPENAI_CHAT_COMPLETION_PARAMS #21195 was meant to establish
• Title mismatch: The PR title says "Fix: add stop param" but the actual changes are for the store parameter

What Changed

• Removed store from OPENAI_CHAT_COMPLETION_PARAMS in constants.py
• Added store to Azure's get_supported_openai_params() list
• Added store to OpenAI's get_supported_openai_params() list
• Added test test_store_param_passed_through_openai_azure() to verify parameter passing
• Minor whitespace cleanup in Azure transformation file

Architecture Concern

The approach creates conflicting parameter handling logic. The global OPENAI_CHAT_COMPLETION_PARAMS list is used by get_standard_openai_params() to identify OpenAI parameters, while provider-specific configs have their own lists. This PR removes store from the global list but adds it to provider-specific lists, which may break the parameter filtering pipeline.

Confidence Score: 1/5

• This PR has critical issues that will break existing tests and functionality
• Removing store from OPENAI_CHAT_COMPLETION_PARAMS will break the test added in PR fix: add store to OPENAI_CHAT_COMPLETION_PARAMS #21195 and cause get_standard_openai_params() to filter out the store parameter for OpenAI/Azure calls, which contradicts the stated purpose of fixing the parameter handling
• litellm/constants.py needs immediate attention - the removal of store will break existing functionality and tests

Important Files Changed

Filename	Overview
litellm/constants.py	Removed store from OPENAI_CHAT_COMPLETION_PARAMS - this could be problematic as it may break functionality added in PR #21195
litellm/llms/azure/chat/gpt_transformation.py	Added store to Azure's supported params list and removed trailing whitespace
litellm/llms/openai/chat/gpt_transformation.py	Added store to OpenAI's supported params list
tests/llm_translation/test_optional_params.py	Added comprehensive test for store parameter passing through OpenAI and Azure providers

_{Last reviewed commit: 44a68cf}

[greptile-apps]

_{4 files reviewed, 1 comment}

_{Edit Code Review Agent Settings | Greptile}

[greptile-apps]

Removing store from OPENAI_CHAT_COMPLETION_PARAMS will break the existing test test_store_in_openai_chat_completion_params() added in PR #21195 (litellm/constants.py:581). This test explicitly checks assert "store" in OPENAI_CHAT_COMPLETION_PARAMS and will fail.

Additionally, get_standard_openai_params() relies on this list to identify standard OpenAI parameters. Removing store means it will be filtered out when calling OpenAI/Azure, breaking the functionality that PR #21195 was supposed to fix.