The AI Models Index tracks 178 model releases with verified public release...

https://bizzmarkblog.com/what-counts-as-a-premium-ai-model-release-in-this-index/

The AI Models Index tracks 178 model releases with verified public release dates and blind-vote checks, helping you compare changes before upgrading. Its 4.5-day median update gap makes it easier to see whether a new version is worth the switch.