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Anthropic: Claude Opus 4.6 (Fast)

anthropic/claude-opus-4.6-fast

Fast-mode variant of Opus 4.6 - identical capabilities with higher output speed at premium 6x pricing.

Learn more in Anthropic's docs: https://platform.claude.com/docs/en/build-with-claude/fast-mode(opens in new tab)

Modalities

Context

1M

Released

Apr 7, 2026

About Anthropic: Claude Opus 4.6 (Fast)

OpenRouter makes Anthropic: Claude Opus 4.6 (Fast) available through a unified, OpenAI-compatible API using the model ID anthropic/claude-opus-4.6-fast.

Anthropic: Claude Opus 4.6 (Fast) accepts text, images and files such as PDFs and returns text. It has a 1,000,000-token context window.

It was released on April 7, 2026.

More models from Anthropic

  • Claude Opus 5 (Fast)
  • Claude Opus 5
  • Claude Sonnet 5

Frequently asked questions

Fast-mode variant of Opus 4.6 - identical capabilities with higher output speed at premium 6x pricing. Learn more in Anthropic's docs: https://platform.claude.com/docs/en/build-with-claude/fast-mode(opens in new tab)

Claude Opus 4.6 (Fast) has a 1,000,000 token context window.

Claude Opus 4.6 (Fast) accepts text, images and files such as PDFs as input and returns text.

Claude Opus 5 (Fast), Claude Opus 5, Claude Sonnet 5 and 14 more are other text models from Anthropic.

Claude Opus 4.6 (Fast) was released on April 7, 2026.

ActivityFAQ

Activity

Token volume and request traffic to this model over time.