What does the 'max_tokens' parameter control in the Claude API?
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Short Explanation and Infographic
max_tokens is like telling a writer 'keep it under 500 words' — it caps how long Claude's response can be, not how long your question can be.
Full explanation below image
Full Explanation
The max_tokens parameter sets an upper bound on the number of tokens Claude generates in its response. Claude will stop generating when it reaches this limit or naturally completes its response, whichever comes first. This is critical for cost control and latency management. Option A is wrong — input token limits are governed by the model's context window, not max_tokens. Option C describes usage limits or billing caps, which are account-level settings in the Anthropic Console. Option D is wrong — there is no minimum token parameter; Claude can generate a single token if appropriate.