Error2 reports
Fix InternalServerError
in LiteLLM
✅ Solution
InternalServerError in litellm often arises from unexpected keyword arguments being passed to the underlying model provider's API. To fix this, carefully inspect the `litellm_params` you're providing, ensuring that only valid parameters for the specific model (e.g., OpenAI, Vertex AI) are included and remove any extraneous or misspelled arguments that might be causing the conflict. Refer to the model provider's documentation for a list of valid parameters or utilize `model_info` to determine valid fields.
Related Issues
Real GitHub issues where developers encountered this error:
Custom_openaiException - AsyncCompletions.create() got an unexpected keyword argument 'client_metadata'May 22, 2026
[Bug]: `cache_control_injection_points` in litellm_params causes `vertex_project` to leak as unexpected kwarg for Vertex AI gemini-3.5-flash and gemini-3.1-flash-lite (GA) modelsMay 21, 2026
Timeline
First reported:May 21, 2026
Last reported:May 22, 2026