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

https://wiki-square.win/index.php/What_Counts_as_%22Public_Use%22_for_an_AI_Model_Release_Date%3F

The AI Models Index tracks premium model releases from 15 leading labs since 2023, verified with exact dates and blind-vote checks for accuracy. Updated every two weeks, it shows that release frequency has improved by 56%—for example, GPT-5