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Anthropic

Claude Opus release timeline

8 versions 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 Claude Opus Anthropic · 8 versions · 2024 – 202617345168 8.73Mar 2024 22.84.1Aug 2025 29.14.5Nov 2025 31.94.6Feb 2026 40.74.7Apr 2026 41.84.8May 2026 50.85Jul 2026 57.65.5Sep 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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