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AI Model Radar
OpenAI

GPT-5 release timeline

6 versions across 2025 – 2026. Heights show the Artificial Analysis Intelligence Index for each release. The latest is GPT-5.5.

RELEASE TIMELINE GPT-5 OpenAI · 6 versions · 2025 – 2026 36.15Aug 2025 38.95.1Nov 2025 42.25.2Dec 2025 44.35.3Feb 2026 51.45.4Mar 2026 54.85.5Apr 2026 INTELLIGENCE INDEX ↑ AI Model Radar aimodelradar.app · Performance: Artificial Analysis
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Anthropic Google OpenAI
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Claude Opus Gemini Flash GPT-5 Gemini Pro Claude Sonnet GPT-4 OpenAI o-series

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