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

https://www.bookmarking-online.win/the-ai-models-index-shows-that-new-ai-releases-are-arriving-roughly-every-4-5

The AI Models Index tracks premium model releases from 15 labs since 2023, verifying dates and using blind-vote checks to ensure accuracy. Updated every two weeks, it shows the pace of progress—like how GPT-5.2 rolled out just 4.5 days after GPT-5