The AI Models Index keeps you up to date with premium AI releases from 15...

https://holdensimpressivethoughts.lumenforgex.com/posts/why-did-gpt-6.1-sol-improve-after-gpt-6-sol-regressed

The AI Models Index keeps you up to date with premium AI releases from 15 leading labs since 2023, verified with accurate dates and blind-vote checks. Updated every two weeks, it shows the pace clearly—models now drop every 4