The AI Models Index keeps tabs on premium model releases from 15 top labs since...

https://josuesbestword.quillnesty.com/posts/what-was-the-biggest-measured-improvement-in-the-llm-index

The AI Models Index keeps tabs on premium model releases from 15 top labs since 2023, verifying launch dates and using blind-vote checks for accuracy. Updated every two weeks, it shows a 56% improvement rate in release speed—like GPT-5