Anthropic

The Claude API can ingest 1M tokens when using Claude Opus 4.7, Opus 4.6, or Sonnet 4.6, and 200K+ tokens (about 500 pages of text or more) when using all other models.

For more detailed information, see our <b><a href="https://platform.claude.com/docs/en/build-with-claude/context-windows#1-m-token-context-window" rel="nofollow noopener noreferrer" target="_blank">Claude API Docs</a></b> and <b><a href="https://platform.claude.com/docs/en/about-claude/models/overview" rel="nofollow noopener noreferrer" target="_blank">Models overview</a></b>.

How large is the Claude API’s context window?

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