fix(sap): pass through extra params from allowed_openai_params

[dee-walia20]

Problem

When using allowed_openai_params with the SAP provider, extra parameters
(like Gemini's thinking_config) are filtered out in transform_request.

response = litellm.completion(
    model="sap/gemini-2.5-flash",
    messages=[...],
    thinking_config={"thinking_budget": 0},
    allowed_openai_params=["thinking_config"],  # Ignored!
)

Solution

Extend supported_params with any extra params that passed get_optional_params()
validation (via allowed_openai_params).

This is a generic fix - any new provider-specific params can be passed through
without code changes.

Changes

• litellm/llms/sap/chat/transformation.py: 2 lines added in transform_request

Fixes #18412

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Project	Deployment	Review	Updated (UTC)
litellm	Ready	Preview, Comment	Dec 25, 2025 4:10pm

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