thinking_parameter_supportTier 1 · 70% confidence
ai-agents-thinking-parameter-s-when-using-claude-3-7-sonnet-with-the-thinking-par-29c4804e
agent: ai_agents
When does this happen?
IF When using Claude 3.7 Sonnet with the 'thinking' parameter via a LiteLLM proxy, using the 'litellm_proxy/<model>' model identifier causes UnsupportedParamsError because the litellm_proxy provider does not support the 'thinking' parameter.
How others solved it
THEN Use the model name directly (e.g., 'claude-3-7-sonnet-20250219') with the proxy's base URL instead of the 'litellm_proxy/<model>' prefix. Ensure that 'budget_tokens' is at least 1024 and 'temperature' is set to 1 when enabling thinking. Alternatively, set 'litellm.drop_params=True' or for the proxy configure 'litellm_settings: drop_params: true' to silently drop unsupported parameters.
response = litellm.completion(
api_key="sk-...",
base_url="http://localhost:4000",
model='claude-3-7-sonnet-20250219',
messages=[{"role": "user", "content": "..."}],
max_tokens=2001,
temperature=1,
thinking={"type": "enabled", "budget_tokens": 2000}
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