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

https://www.adirs-bookmarks.win/the-ai-models-index-keeps-you-up-to-date-on-premium-releases-from-15-top-labs

The AI Models Index tracks premium model releases from 15 labs since 2023, verifying dates and using blind-vote checks for accuracy. Updated biweekly, it shows a steady pace—like GPT-5.2 rolling out just 4.5 days after GPT-5.1, a 56% faster release rate