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

https://wiki-wire.win/index.php/What_Are_Release_Days_and_Why_Do_They_Matter_More_Than_Raw_Releases%3F

The AI Models Index tracks premium model releases from 15 top labs since 2023, verifying release dates and using blind-vote checks for accuracy. Updated every two weeks, it shows models improving release speed by 56%, with GPT-5.2 launching just 4