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

https://weekly-wiki.win/index.php/Do_Capability_Benchmarks_Ever_Go_Backwards_Even_When_LMArena_Does%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