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Claude Opus 4.8 (Fast)

Name: Claude Opus 4.8 (Fast)
Author: Anthropic

by Anthropic

Fast-mode variant of [Opus 4.8](/anthropic/claude-opus-4.8) - identical capabilities with higher output speed at 2x pricing relative to regular Opus 4.8. Learn more in Anthropic's

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Models

Claude Opus 4.8 (Fast)

Added 10 July 2026

#anthropic

Overview

Fast-mode variant of [Opus 4.8](/anthropic/claude-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-fast Docs

OpenRouter id: anthropic/claude-opus-4.8-fast

Notes

Claude Opus 4.8 (Fast) is listed in the EDNA Models directory from the OpenRouter catalogue.

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