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Anthropic release timeline

8 releases across 2024 – 2026. Heights show the Artificial Analysis Intelligence Index for each release. The latest is Claude Opus 5.5.

RELEASE TIMELINE · AI MODEL RADAR Anthropic Anthropic · 8 versions · 2024 – 202617345168 8.73 OpusMar 2024 40.7Opus 4.7Apr 2026 41.8Opus 4.8May 2026 49.6Fable 5Jun 2026 38.2Sonnet 5Jun 2026 50.8Opus 5Jul 2026 53.4Fable 5.1Aug 2026 57.6Opus 5.5Sep 2026 aimodelradar.app · Intelligence Index: Artificial Analysis
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Anthropic Google OpenAI
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Claude Opus Gemini Flash Claude Fable Claude Sonnet GPT-5 Gemini Pro Claude Haiku GPT-4 OpenAI o-series

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