Anthropic models
Release timeline
When each model was first publicly available.
Claude 3 HaikuMar 13, 2024
Claude Opus 4.0May 22, 2025
Claude Sonnet 4.0May 22, 2025
Claude Opus 4.1Aug 5, 2025
Claude Sonnet 4.5Sep 29, 2025
Claude Haiku 4.5Oct 15, 2025
Claude Opus 4.5Nov 24, 2025
Claude Opus 4.6Feb 5, 2026
Claude Sonnet 4.6Feb 17, 2026
Claude Opus 4.7Apr 16, 2026
Claude Opus 4.8May 28, 2026
Claude Fable 5Jun 9, 2026
Claude Sonnet 5Jun 30, 2026
Claude Opus 5Jul 24, 2026
Claude Fable 5.1Sep 1, 2026
Claude Opus 5.5Sep 22, 2026
Claude Sonnet 5.5Sep 28, 2026
Claude Haiku 5.5Oct 7, 2026
Claude Fable 5.1
Claude Fable 5
Claude Sonnet 5.5
Claude Sonnet 5
Claude Opus 5.5
Claude Opus 5
Claude Opus 4.8
Claude Opus 4.7
Claude Opus 4.6
Claude Sonnet 4.6
Claude Opus 4.5
Claude Opus 4.1
Claude Opus 4.0
Claude Sonnet 4.5
Claude Sonnet 4.0
Claude Haiku 5.5
Claude Haiku 4.5
Claude 3 Haiku
Frequently asked questions
Sim currently tracks 18 Anthropic models including Claude Fable 5.1, Claude Fable 5, Claude Sonnet 5.5, Claude Sonnet 5, Claude Opus 5.5, Claude Opus 5, and more.
