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

https://holdenssplendiddigests.zenbloomer.com/posts/why-do-first-impressions-fade-on-lmarena-after-launch-week

The AI Models Index tracks premium releases from 15 leading labs since 2023, with verified dates and blind-vote accuracy checks. Updated every two weeks, it shows average release cycles improving by 56%, now just 4.5 days apart