Confirmed model releases

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.

15 confirmed releases1 providersData through Sep 1, 2026How releases are confirmed

Anthropic release archive

15 confirmed releases · latest Sep 1, 2026

Provider dossier

Confirmed releases

Release	Provider	Confirmed	Evidence	BenchLM
September 2026· 1 release
Claude Fable 5.1 and Claude Mythos 5.12 model variants	Anthropic	Sep 1, 2026Exact day	Anthropic	Benchmarks
July 2026· 1 release
Claude Opus 5	Anthropic	Jul 24, 2026Exact day	Anthropic	Benchmarks
June 2026· 2 releases
Claude Sonnet 5	Anthropic	Jun 30, 2026Exact day	Anthropic	Benchmarks
Claude Fable 5 and Claude Mythos 52 model variants	Anthropic	Jun 9, 2026Exact day	Anthropic	Benchmarks
May 2026· 1 release
Claude Opus 4.8	Anthropic	May 28, 2026Exact day	Anthropic	Benchmarks
April 2026· 2 releases
Claude Opus 4.72 model variants	Anthropic	Apr 16, 2026Exact day	Anthropic announcement	Benchmarks
Claude Mythos Preview	Anthropic	Apr 7, 2026Exact day	Anthropic Project Glasswing	Benchmarks
February 2026· 1 release
Claude 4.62 model variants	Anthropic	February 2026Month precision	Anthropic system card	Benchmarks
November 2025· 1 release
Claude Opus 4.5	Anthropic	November 2025Month precision	Anthropic	Benchmarks
October 2025· 1 release
Claude Haiku 4.5	Anthropic	Oct 15, 2025Exact day	Anthropic	Benchmarks
September 2025· 1 release
Claude Sonnet 4.5	Anthropic	September 2025Month precision	Anthropic	Benchmarks
August 2025· 1 release
Claude 4.1 Opus	Anthropic	August 2025Month precision	Anthropic	Benchmarks
May 2025· 1 release
Claude 4	Anthropic	May 2025Month precision	Anthropic	Benchmarks
June 2024· 1 release
Claude 3.5 Sonnet	Anthropic	June 2024Month precision	Anthropic	Benchmarks
March 2024· 1 release
Claude 3 family2 model variants	Anthropic	March 2024Month precision	Anthropic	Benchmarks

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