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

https://highstylife.com/why-are-lmarena-gains-smaller-in-2026-than-2025/

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 releases now come every 4.5 days on average—a 56% speed improvement