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

https://echo-wiki.win/index.php/Is_GPT-5.2_Actually_Worse_Than_GPT-5.1_in_Blind_Votes%3F

The AI Models Index tracks premium model releases from 15 labs since 2023, with verified dates and blind-vote checks to ensure accuracy. Updated every two weeks, it shows that releases come every 4.5 days on average in 2026—a 56% faster pace