Release timeline
When each model was first publicly available.
GPT-4oMay 13, 2024
GPT-4.1Apr 14, 2025
GPT-4.1 MiniApr 14, 2025
GPT-4.1 NanoApr 14, 2025
Model RouterApr 14, 2025
o3Apr 16, 2025
o4 MiniApr 16, 2025
GPT-5Aug 7, 2025
GPT-5 MiniAug 7, 2025
GPT-5 NanoAug 7, 2025
GPT-5 Chat LatestAug 7, 2025
GPT-5.1Nov 12, 2025
GPT-5.1 CodexNov 12, 2025
GPT-5.2Dec 11, 2025
GPT-5.4Mar 5, 2026
GPT-5.4 MiniMar 17, 2026
GPT-5.4 NanoMar 17, 2026
Frequently asked questions
Sim currently tracks 17 Azure OpenAI models including GPT-4o, GPT-5.4, GPT-5.4 Mini, GPT-5.4 Nano, GPT-5.2, GPT-5.1, and more.