Error3 reports
Fix BadRequestError
in LiteLLM
✅ Solution
BadRequestError in litellm usually indicates an issue with the request you're sending to the LLM provider, such as incorrect parameters, malformed JSON, or exceeding rate limits. To fix it, carefully inspect your request payload against the provider's API documentation, ensuring all parameters are correctly formatted and within allowed limits. Also consider reducing request frequency if rate limits are suspected.
Related Issues
Real GitHub issues where developers encountered this error:
[Bug]: additional_drop_params not dropping prompt_cache_key openai parameterJan 16, 2026
[Bug]: Router retries "BadRequestError" and other 4xx exceptions despite them being non-retryableJan 16, 2026
[Bug]: Anthropic 'context-1m-2025-08-07' beta flag not respected on lib versions 1.80.5 and above when response_format is setJan 16, 2026
Timeline
First reported:Jan 16, 2026
Last reported:Jan 16, 2026