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

https://wiki-nest.win/index.php/When_Was_GPT-6.1_Sol_Released%3F_A_Data-Driven_Look_at_the_Sep_29,_2026_Launch

The AI Models Index tracks premium model releases from 15 top labs since 2023, verifying dates and using blind-vote checks to ensure accuracy. Updated biweekly, it shows improvements like a 56% faster update cycle—GPT-5.2 rolled out just 4