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

https://www.bookmark-fuel.win/the-ai-models-index-shows-that-in-2026-new-ai-models-are-being-released

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