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Anthropic model releases

A newest-first record of confirmed Anthropic launches, linked to the source used for the date and the corresponding BenchLM model record when available.

20 confirmed releases1 providersData through Oct 7, 2026How releases are confirmed
Anthropic logo

Anthropic release archive

20 confirmed releases · latest Oct 7, 2026

Provider dossier

Confirmed releases

ReleaseProviderConfirmedEvidenceBenchLM
October 2026· 1 release
Claude Haiku 5.5
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Exact dayAnthropic Claude Haiku 5.5 announcementBenchmarks
September 2026· 3 releases
Claude Sonnet 5.5
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Exact dayAnthropic Claude Sonnet 5.5 announcementBenchmarks
Claude Opus 5.5
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Exact dayAnthropicBenchmarks
Claude Fable 5.1 and Claude Mythos 5.12 model variants
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Exact dayAnthropicBenchmarks
July 2026· 1 release
Claude Opus 5
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Exact dayAnthropicBenchmarks
June 2026· 2 releases
Claude Sonnet 5
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Exact dayAnthropicBenchmarks
Claude Fable 5 and Claude Mythos 52 model variants
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Exact dayAnthropicBenchmarks
May 2026· 1 release
Claude Opus 4.8
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Exact dayAnthropicBenchmarks
April 2026· 2 releases
Claude Opus 4.72 model variants
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Exact dayAnthropic announcementBenchmarks
Claude Mythos Preview
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Exact dayAnthropic Project GlasswingBenchmarks
February 2026· 1 release
Claude 4.63 model variants
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Month precisionAnthropic system cardBenchmarks
November 2025· 1 release
Claude Opus 4.52 model variants
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Exact dayAnthropicBenchmarks
October 2025· 1 release
Claude Haiku 4.52 model variants
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Exact dayAnthropicBenchmarks
September 2025· 1 release
Claude Sonnet 4.52 model variants
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Exact dayAnthropicBenchmarks
August 2025· 1 release
Claude 4.1 Opus2 model variants
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Exact dayAnthropicBenchmarks
May 2025· 1 release
Claude 43 model variants
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Exact dayAnthropicBenchmarks
February 2025· 1 release
Claude 3.7 Sonnet2 model variants
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Exact dayAnthropicBenchmarks
October 2024· 1 release
Claude 3.5 Haiku
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Exact dayAnthropicBenchmarks
June 2024· 1 release
Claude 3.5 Sonnet
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Month precisionAnthropicBenchmarks
March 2024· 1 release
Claude 3 family2 model variants
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Month precisionAnthropicBenchmarks

Anthropic releases by month

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