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Anthropic

Claude Sonnet release timeline

7 versions across 2024 – 2026. Heights show the Artificial Analysis Intelligence Index for each release. The latest is Claude Sonnet 5.5.

RELEASE TIMELINE · AI MODEL RADAR Claude Sonnet Anthropic · 7 versions · 2024 – 202617335066 5.93Mar 2024 7.93.5Jun 2024 17.73.7Feb 2025 20.74.5Sep 2025 30.14.6Feb 2026 38.25Jun 2026 56.05.5Sep 2026 aimodelradar.app · Intelligence Index: Artificial Analysis
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Claude Haiku Claude Sonnet GPT-6 Claude Opus Gemini Flash Claude Fable GPT-5 Gemini Pro GPT-4 OpenAI o-series

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