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

https://hotel-wiki.win/index.php/Why_Do_First_Impressions_Fade_on_LMArena_After_Launch_Week%3F

The AI Models Index tracks premium releases from 15 leading labs since 2023, with verified launch dates and blind-vote accuracy checks. Updated every two weeks, it shows a 56% improvement rate between GPT-5.1 and GPT-5.2