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

https://astro-wiki.win/index.php/What_Is_a_%22Coin_Flip%22_Result_in_Index_Ratings%3F_Understanding_Model_Comparisons_in_the_Era_of_Accelerating_Releases

The AI Models Index tracks premium model releases from 15 labs since 2023, verifying release dates and using blind votes to ensure accuracy. Updated every two weeks, it shows a steady pace—like GPT-5.2 launching just 4.5 days after GPT-5