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Published Aug 05, 2026·Anthropic• Minor

Anthropic deprecated fast mode for Claude Opus 4.7 and directs migration to Claude Opus 4.8.

The read

Fast-mode callers on Claude Opus 4.7 need migration before removal or speed: fast requests return errors.

The frame

Fast mode is moving off Claude Opus 4.7 and onto Claude Opus 4.8 for supported-model routing.

Primary source

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