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

https://lanesniceblog.scriblorax.com/posts/which-deep-research-ai-was-best-at-finding-correct-release-dates

The AI Models Index tracks premium model releases from 15 labs since 2023, verifying release dates and using blind votes to ensure accuracy. Updated every two weeks, it shows a steady pace—like GPT-5.2 launching just 4.5 days after GPT-5