Error3 reports
Fix UnsupportedParamsError
in LiteLLM
✅ Solution
This error typically occurs in litellm. Check the example issues for common solutions.
Related Issues
Real GitHub issues where developers encountered this error:
[Bug]: Bedrock DeepSeek R1 rejects requests with `thinking`/`reasoning_effort` (400 Validation Error) — additionalModelRequestFields leakJul 15, 2026
[Bug]: Client-supplied `store` and `prompt_cache_key` are silently dropped for OpenAI chat completions (accepted as "supported", never forwarded)Jul 14, 2026
[Bug]: vertex_ai embeddings raise UnsupportedParamsError for encoding_format='float' (OpenAI SDK default)Jul 14, 2026
Timeline
First reported:Jul 14, 2026
Last reported:Jul 15, 2026