The AI Models Index keeps tabs on premium releases from 15 top labs since 2023,...

https://www.blaze-bookmarks.win/the-ai-models-index-keeps-tabs-on-premium-model-releases-from-15-top-labs-since

The AI Models Index keeps tabs on premium releases from 15 top labs since 2023, with verified dates and blind-vote accuracy checks. Updated every two weeks, it shows a 56% improvement rate between GPT-5.1 and GPT-5