Anthropic models

We track 20 Anthropic models. The most recent release is Claude Sonnet 5.5, released 28 Sept 2026.

Official site

ModelReleasedContextInput $/1MOutput $/1MWeights
Claude Sonnet 5.528 Sept 20261M$2$10Closed
Claude Opus 5.522 Sept 20261M$4$20Closed
Claude Fable 5.11 Sept 20261M$10$50Closed
Claude Opus 524 Jul 20261M$5$25Closed
Claude Sonnet 529 Jun 20261M$2$10Closed
Claude Mythos 5preview9 Jun 20261M$10$50Closed
Claude Fable 57 Jun 20261M$10$50Closed
Claude Opus 4.828 May 20261M$5$25Closed
Claude Opus 4.714 Apr 20261M$5$25Closed
Claude Sonnet 4.617 Feb 20261M$3$15Closed
Claude Opus 4.64 Feb 20261M$5$25Closed
Claude Opus 4.524 Nov 2025200K$5$25Closed
Claude Haiku 4.515 Oct 2025200K$1$5Closed
Claude Sonnet 4.529 Sept 20251M$3$15Closed
Claude 3.5 Sonnet9 Sept 2025200K––Closed
Claude Opus 4.15 Aug 2025200K$15$75Closed
Claude Opus 422 May 2025200K$15$75Closed
Claude Sonnet 422 May 2025200K$3$15Closed
Claude Sonnet 3.719 Feb 2025200K––Closed
Claude Haiku 313 Mar 2024200K$0.25$1.25Closed