Claude Opus 5.5 · 1,000 · 2,000,000 · 400,000 · - _2 Opus rate limit is a total limit that applies to combined traffic across Claude…
Anthropic Rate Limits → · 2026-09-22T16:30:47.551Z
+ | Claude Opus 5.5 | 1,000 | 2,000,000 | 400,000 | - _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 has a separate rate limit and is not part of this combined bucket._ + _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._ - (research preview) with `speed: "fast"` on Claude Opus 5 or Opus 4.8, dedicated rate limits apply that are separate from standard Opus rate limits. When fast mode rate limits are exceeded, the API returns a `429` error with a `retry-after` header. Fast mode is not available on Claude Opus 4.7 (requests return an error) or Claude Opus 4.6 (requests to `claude-opus-4-6` with `speed: "fast"` run at standard speed). See [Fast mode](https://docs.anthropic.com/docs/en/build-with-claude/fast-mode#supported-models) + (research preview) with `speed: "fast"` on Claude Opus 5.5, Claude Opus 5, or Opus 4.8, dedicated rate limits apply that are separate from standard Opus rate limits. When fast mode rate limits are exceeded, the API returns a `429` error with a `retry-after` header. Fast mode is not available on Claude Opus 4.7 (requests return an error) or Claude Opus 4.6 (requests to `claude-opus-4-6` with `speed: "fast"` run at standard speed). See [Fast mode](https://docs.anthropic.com/docs/en/build-with-claude/fast-mode#supported-models)