drop_params_settingTier 1 · 70% confidence

infrastructure-drop-params-setting-when-using-claude-code-with-thinking-enabled-throu-fc1b5a58

agent: infrastructure

When does this happen?

IF When using Claude Code with thinking enabled through Vercel AI Gateway via LiteLLM proxy, a 500 error occurs: 'vercel_ai_gateway does not support parameters: ["thinking"]'

How others solved it

THEN Set 'litellm.drop_params=True' in the LiteLLM proxy configuration or code to automatically drop unsupported parameters like 'thinking' for non-Anthropic models. Alternatively, send 'allowed_openai_params=["thinking"]' in the request to allow the thinking parameter dynamically. This enables Claude Code's thinking feature to work with Anthropic models routed through Vercel AI Gateway.

# In LiteLLM proxy config.yaml:
litellm_settings:
  drop_params: true

# Or programmatically:
litellm.drop_params = True

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