The AI Models Index tracks premium model releases from 15 labs since 2023,...

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

The AI Models Index tracks premium model releases from 15 labs since 2023, verified with exact dates and blind-vote checks. Updated every two weeks, it shows an average 4.5-day gap between releases—a 56% faster pace. See clear comparisons like GPT-5