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

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

The AI Models Index tracks premium model releases from 15 top AI labs since 2023, with verified release dates and blind-vote quality checks. Updated every two weeks, it shows a 56% faster release rate in 2026. For example, GPT-5.2 outpaced GPT-5