We've deprecated fast mode for Claude Opus 4.7, with removal on July 24, 2026.

1. 25 Jun 2026 Announced · Claude Platform release notesWe've deprecated fast mode for Claude Opus 4.7, with removal on July 24, 2026.
2. 29 Jun 2026 Product newsWe've removed fast mode for Claude Opus 4.6.
3. 24 Jul 2026 Product newsWe've removed fast mode for Claude Opus 4.7.
4. 24 Jul 2026 DeadlineThe date in the announcement
5. 22 Sep 2026 Product newsFast mode (research preview) is available for Claude Opus 5.5 on the Claude API.

• We announced the deprecation of the Claude Sonnet 4.5 model (claude-sonnet-4-5-20250929), with retirement on the Claude API scheduled for November 30, 2026.30 Nov 2026 · Claude Platform release notes
• The legacy Workbench (platform.claude.com/workbench) in the Claude Console is being sunset with access ending on August 17, 2026.17 Aug 2026 · Claude Platform release notes

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• Lifecycle: every end of support and retirement ahead.