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Sweep 10 Nov 2026 · 02:18Z Build v2.1.322 539 read Stable v2.1.311 Latest v2.1.322 Next v2.1.322 Feeds RSS JSON llms.txt llms-full.txt Unofficial
HomeDocsClaude Developer Platform 9 Nov 2026
One change · api

rate-limits changedapi/rate-limits

Nearest release: v2.1.321, published under an hour after this site recorded the change. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.

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First seen 14 Aug 2026 this site's first read of the page
Recorded edits28to this page, all time

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179*<sup>1 Fable rate limit is a total limit that applies to combined traffic across Claude Fable 5.1 and Claude Fable 5. Claude Mythos 5.1 and Claude Mythos 5 share a separate combined limit on the same terms.</sup>*
179*<sup>1 Fable rate limit is a total limit that applies to combined traffic across Claude Fable 5.1 and Claude Fable 5. Claude Mythos 5.1 and Claude Mythos 5 share a separate combined limit.</sup>*
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181181*<sup>2 Opus rate limit is a total limit that applies to combined traffic across Claude Opus 4.8, Opus 4.7, Opus 4.6, and Opus 4.5. Claude Opus 5.5 and Claude Opus 5 each have a separate rate limit and are not part of this combined bucket.</sup>*
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226226### Fast mode rate limits
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228When using [fast mode](https://platform.claude.com/docs/en/build-with-claude/fast-mode) with `speed: "fast"` on Claude Opus 5.5, Claude Opus 5, or Claude Opus 4.8, dedicated rate limits apply that are separate from standard Opus rate limits. Claude Opus 5.5 has a default fast mode rate limit in the Start, Build, and Scale tiers, so you don’t need to request access to use fast mode with it. Organizations in the Evaluation tier can use fast mode with Claude Opus 5.5 once they move to the Start, Build, or Scale tier. Fast mode for Claude Opus 5 and Claude Opus 4.8 is in research preview. To see your fast mode rate limits, go to the [Rate limits](https://platform.claude.com/usage/limits) page in the Claude Console. When fast mode rate limits are exceeded, the API returns a `429` error with a `retry-after` header.
228When you use [fast mode](https://platform.claude.com/docs/en/build-with-claude/fast-mode) with `speed: "fast"` on Claude Opus 5.5, Claude Opus 5, or Claude Opus 4.8, dedicated rate limits apply. They are separate from standard rate limits. Claude Opus 5.5 has a default fast mode rate limit in the Start, Build, and Scale tiers, so you don’t need to request access to use fast mode with it. Organizations in the Evaluation tier can use fast mode with Claude Opus 5.5 once they move to the Start, Build, or Scale tier. Fast mode for Claude Opus 5 and Claude Opus 4.8 is in research preview. To see your fast mode rate limits, go to the [Rate limits](https://platform.claude.com/usage/limits) page in the Claude Console. When you exceed your fast mode rate limits, the API returns a `429` error with a `retry-after` header.
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230230The response includes `anthropic-fast-*` headers that indicate your fast mode rate limit status. See [Fast mode rate limits](https://platform.claude.com/docs/en/build-with-claude/fast-mode#rate-limits) for details on these headers.
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