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Family

Claude 4 family

12 releases · Elo progression and succession lineage (D9)

Elo progression

May 2025Claude Opus 4CLOSED—1637.6 May 2025Claude Sonnet 4CLOSED—1533.4 Aug 2025Claude Opus 4.1CLOSED—succeeds Claude Opus 4+62.61700.2 Sep 2025Claude Sonnet 4.5CLOSED—succeeds Claude Opus 4.1+205.41905.6 Oct 2025Claude Haiku 4.5CLOSED—succeeds Claude Sonnet 4.5-3871518.6 Nov 2025Claude Opus 4.5CLOSED—succeeds Claude Haiku 4.5+669.32187.9 Nov 2025Claude Opus 4.5 (High)CLOSED—succeeds Claude Haiku 4.5+701.92220.5 Nov 2025Claude Opus 4.5 (Medium)CLOSED—succeeds Claude Haiku 4.52266.8 Feb 2026Claude Opus 4.6CLOSED—succeeds Claude Opus 4.5+232.62420.5 Feb 2026Claude Sonnet 4.6CLOSED—succeeds Claude Opus 4.6-50.42370.1 Apr 2026Claude Opus 4.7CLOSED—succeeds Claude Sonnet 4.6+279.92650.0 May 2026Claude Opus 4.8CLOSED—succeeds Claude Opus 4.7+20.22670.2