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Anthropic: Fast mode for Claude Opus 5.5 left research preview and received a default rate limit in Start, Build and Scale tiers.

ProductClaude API (Claude Opus 5.5 fast mode)
Categoryrate-limit
Announced / detected2026-10-15
Effectivenot stated in source
BeforeResearch preview, access by request
AfterDefault fast mode rate limit in Start, Build, and Scale tiers; no beta header needed
Official sourcehttps://docs.anthropic.com/en/release-notes/api
Source quote
Claude Opus 5.5 now has a default fast mode rate limit in the Start, Build, and Scale usage tiers.
ArchiveNo post-change Wayback capture found
Snapshot hashsha256:806d3e5703c55457d85dfabebb0ee883d6764df142af611ad9ebe66c5f9c5527
Statusverified

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