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

https://stateofseo.com/understanding-the-difference-between-point-releases-and-new-generations-in-large-language-models/

The AI Models Index tracks premium releases from 15 top labs since 2023, with verified launch dates and blind-vote accuracy checks. Updated biweekly, it shows how model updates are speeding up—like GPT-5.2 arriving just 4.5 days after GPT-5