Claude Opus 4.7 Fast Mode
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Claude Opus 4.7 Fast Mode Is Now in Research Preview on the API and Claude Code
Anthropic has launched Fast Mode for Claude Opus 4.7 in research preview, available on the API and in Claude Code — bringing significantly lower latency to their most capable model without sacrificing quality.
### TL;DR
Claude Opus 4.7 Fast Mode is a research preview enabling significantly faster output token generation for Claude Opus 4.7 — Anthropic's most capable model. Access it via the API by setting speed: "fast" with the fast-mode-2026-02-01 beta header. Pricing and rate limits match Opus 4.6 fast mode.
Key Insights & Metrics
Key Features
- Significantly faster output token generation for Claude Opus 4.7
- Access via API with speed: "fast" and fast-mode-2026-02-01 beta header
- Same pricing and rate limits as Opus 4.6 fast mode; waitlist access available
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