fix: add store to OPENAI_CHAT_COMPLETION_PARAMS

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Summary

The OpenAI store parameter (docs) was missing from OPENAI_CHAT_COMPLETION_PARAMS in litellm/constants.py.

This caused store to be unrecognized by helper functions that rely on this list (get_standard_openai_params(), litellm_proxy provider config). More critically, code paths using OPENAI_CHAT_COMPLETION_PARAMS instead of DEFAULT_CHAT_COMPLETION_PARAM_VALUES would treat store as a provider-specific parameter and forward it to non-OpenAI providers like Anthropic, causing:

store: Extra inputs are not permitted

Changes

• litellm/constants.py: Added "store" to OPENAI_CHAT_COMPLETION_PARAMS (it was already in DEFAULT_CHAT_COMPLETION_PARAM_VALUES)
• tests/llm_translation/test_optional_params.py: Added 3 tests:
  • test_drop_store_param_for_anthropic — verifies drop_params=True strips store for Anthropic
  • test_additional_drop_params_store_for_anthropic — verifies additional_drop_params=["store"] works
  • test_store_in_openai_chat_completion_params — verifies store is in the params list and recognized by get_standard_openai_params()

Context

Discovered while running OpenClaw through a LiteLLM proxy to Anthropic. OpenClaw sends store=true in its OpenAI-compatible requests, which leaked through to Anthropic and was rejected.

Fixes #19700

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Project	Deployment	Actions	Updated (UTC)
litellm	Error		Feb 14, 2026 7:17am

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Greptile Overview

Greptile Summary

Adds "store" to OPENAI_CHAT_COMPLETION_PARAMS in litellm/constants.py, fixing an inconsistency where store was already present in DEFAULT_CHAT_COMPLETION_PARAM_VALUES but missing from the params list. This caused get_standard_openai_params() and LiteLLMProxyChatConfig to not recognize store as a standard OpenAI parameter, leading to it being forwarded to non-OpenAI providers (e.g. Anthropic) and causing "Extra inputs are not permitted" errors.

• Bug fix: Added "store" to OPENAI_CHAT_COMPLETION_PARAMS constant list
• Tests: 3 new tests verify store is dropped for Anthropic with drop_params=True, additional_drop_params=["store"], and is recognized as a standard OpenAI param
• Whitespace: Minor trailing whitespace cleanup in existing test functions

Fixes #19700

Confidence Score: 5/5

• This PR is safe to merge — it is a minimal, correct one-line constant addition with comprehensive tests.
• The change is a single string addition to a constant list, bringing it in line with the already-existing entry in DEFAULT_CHAT_COMPLETION_PARAM_VALUES. The fix is well-motivated by a real issue ([Bug]: drop_params field doesn;t work #19700), thoroughly tested with 3 new tests, and introduces zero risk of regression.
• No files require special attention.

Important Files Changed

Filename	Overview
litellm/constants.py	Adds "store" to OPENAI_CHAT_COMPLETION_PARAMS list, aligning it with DEFAULT_CHAT_COMPLETION_PARAM_VALUES which already included store. This is a correct, minimal one-line fix.
tests/llm_translation/test_optional_params.py	Adds 3 new tests verifying store is properly dropped for Anthropic (with drop_params and additional_drop_params) and is recognized in OPENAI_CHAT_COMPLETION_PARAMS. Also includes minor whitespace cleanup (trailing spaces removed).

Flowchart

flowchart TD
    A["Client sends store=true<br/>(e.g. OpenClaw via proxy)"] --> B["get_optional_params()"]
    B --> C["pre_process_non_default_params()<br/>checks DEFAULT_CHAT_COMPLETION_PARAM_VALUES"]
    C --> D{"Provider supports store?"}
    D -->|"OpenAI"| E["get_standard_openai_params()<br/>checks OPENAI_CHAT_COMPLETION_PARAMS"]
    E --> F{"store in OPENAI_CHAT_COMPLETION_PARAMS?"}
    F -->|"Before fix: No"| G["store silently dropped<br/>for OpenAI calls"]
    F -->|"After fix: Yes"| H["store forwarded<br/>to OpenAI API ✓"]
    D -->|"Anthropic"| I{"drop_params=True?"}
    I -->|"Yes"| J["store dropped ✓"]
    I -->|"No"| K["UnsupportedParamsError raised"]

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Additional Comments (1)

litellm/constants.py
Pre-existing: duplicate "temperature" entry

Not introduced by this PR, but "temperature" appears twice in OPENAI_CHAT_COMPLETION_PARAMS (lines 530-531). Since this is a list (not a set), the duplicate is harmless for in checks, but it's worth cleaning up.

    "temperature",