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Family

Claude 4 family

12 releases · Elo progression and succession lineage (D9)

Elo progression

May 2025Claude Opus 4CLOSED—1674.4 May 2025Claude Sonnet 4CLOSED—1566.9 Aug 2025Claude Opus 4.1CLOSED—succeeds Claude Opus 4+59.41733.8 Sep 2025Claude Sonnet 4.5CLOSED—succeeds Claude Opus 4.1+2051938.8 Oct 2025Claude Haiku 4.5CLOSED—succeeds Claude Sonnet 4.5-382.81556.0 Nov 2025Claude Opus 4.5CLOSED—succeeds Claude Haiku 4.5+672.22228.2 Nov 2025Claude Opus 4.5 (High)CLOSED—succeeds Claude Haiku 4.5+705.52261.5 Nov 2025Claude Opus 4.5 (Medium)CLOSED—succeeds Claude Haiku 4.52255.6 Feb 2026Claude Opus 4.6CLOSED—succeeds Claude Opus 4.5+205.52433.7 Feb 2026Claude Sonnet 4.6CLOSED—succeeds Claude Opus 4.6-16.52417.2 Apr 2026Claude Opus 4.7CLOSED—succeeds Claude Sonnet 4.6+257.32674.5 May 2026Claude Opus 4.8CLOSED—succeeds Claude Opus 4.7+81.52756.0