Fast mode removed from Opus 4.7; requests error
1 enhancementThis release1 enhancementImprovements to existing featuresAI-tallied from the release notes
From the original release noteView original ↗
Fast mode for Claude Opus 4.7 has been removed. Requests to claude-opus-4-7 with speed: "fast" now return an error (unlike Claude Opus 4.6, which falls back to standard speed). Claude Opus 4.7 remains available at standard speed. Migrate to Claude Opus 5 or Claude Opus 4.8 to continue using fast mode.
Fetched July 28, 2026
