The AI Models Index keeps track of premium releases from 15 labs since 2023,...

https://www.active-bookmarks.win/the-ai-models-index-keeps-tabs-on-premium-releases-from-15-top-labs-since-2023

The AI Models Index keeps track of premium releases from 15 labs since 2023, verified with blind-vote checks and accurate dates. Updated every two weeks, it shows how model development speeds up—GPT-5.2 launched just 4.5 days after GPT-5