Claude Opus 4.8 (Fast)
by Anthropic
Fast-mode variant of Opus 4.8 - identical capabilities with higher output speed at 2x pricing relative to regular Opus 4.8. Learn more in Anthropic's
Models
Claude Opus 4.8 (Fast)
Added 10 July 2026
Overview
Fast-mode variant of Opus 4.8 - identical capabilities with higher output speed at 2x pricing relative to regular Opus 4.8. Learn more in Anthropic's docs: https://platform.claude.com/docs/en/build-with-claude/fast-mode
How to use / API access
Call via OpenRouter with model id `anthropic/claude-opus-4.8-fast`.
- openrouter ·
anthropic/claude-opus-4.8-fastDocs
OpenRouter id: anthropic/claude-opus-4.8-fast
Benchmarks
- Intelligence Index (artificial-analysis): 55.7 index
- Coding Index (artificial-analysis): 74.3 index
- Agentic Index (artificial-analysis): 47.2 index
Notes
Claude Opus 4.8 (Fast) is listed in the EDNA Models directory from the OpenRouter catalogue.
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