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

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

The AI Models Index tracks premium model releases from 15 labs since 2023, verified with exact dates and blind-vote checks. Updated biweekly, it shows improvements like a 56% faster release pace—averaging just 4.5 days between updates