The AI Models Index tracks premium model releases from 15 labs since 2023,...

https://wiki-room.win/index.php/How_Often_Do_Premium_AI_Models_Ship_in_2026%3F

The AI Models Index tracks premium model releases from 15 labs since 2023, verifying launch dates and using blind votes to ensure accuracy. Updated every two weeks, it shows a steady pace—like the 4.5 days between GPT-5.1 and GPT-5