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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
ActivityFAQ

Activity

Token volume and request traffic to this model over time.

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.