The AI Models Index keeps tabs on premium model releases from 15 labs since...

https://delta-wiki.win/index.php/Why_Do_AI_Version_Numbers_Keep_Going_Up_But_Quality_Barely_Moves%3F

The AI Models Index keeps tabs on premium model releases from 15 labs since 2023, with verified launch dates and blind-vote quality checks. Updated every two weeks, it shows the pace of innovation — like GPT-5.2 rolling out just 4.5 days after GPT-5