The AI Models Index tracks premium model releases from 15 top 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 top labs since 2023, verifying release dates and using blind-vote checks for accuracy. Updated every two weeks, it shows models improving release speed by 56%, with GPT-5.2 launching just 4