The AI Models Index keeps you up to date on premium model releases from 15...

https://wiki-square.win/index.php/What_Was_the_Biggest_Measured_Improvement_in_the_LLM_Index%3F

The AI Models Index keeps you up to date on premium model releases from 15 leading labs since 2023, with verified launch dates and blind-vote quality checks. Updated every two weeks, it shows a steady pace—like GPT-5.2 dropping just 4.5 days after GPT-5.1