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OpenAI release timeline

8 releases across 2023 – 2026. Heights show the Artificial Analysis Intelligence Index for each release. The latest is GPT-5.6-sol.

RELEASE TIMELINE · AI MODEL RADAR OpenAI OpenAI · 8 versions · 2023 – 202614284256 5.5GPT-3.5-turboFeb 2023 23.0GPT-5Aug 2025 24.7GPT-5.1Nov 2025 30.4GPT-5.2Dec 2025 32.5GPT-5.3-codexFeb 2026 39.0GPT-5.4Mar 2026 38.6GPT-5.5Apr 2026 47.1GPT-5.6-solJun 2026 aimodelradar.app · Intelligence Index: Artificial Analysis
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Claude Fable Gemini Flash Claude Opus Claude Sonnet GPT-5 Gemini Pro Claude Haiku GPT-4 OpenAI o-series

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