The AI Models Index keeps you up to date on premium releases from 15 top labs...

https://holdensimpressivethoughts.lumenforgex.com/posts/why-are-some-models-gray-and-not-rated-in-the-lmarena-timeline

The AI Models Index keeps you up to date on premium releases from 15 top labs since 2023, with verified dates and blind-vote accuracy checks. Updated biweekly, it shows how fast models evolve—like GPT-5.2 dropping just 4.5 days after GPT-5