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

https://penelopessmartdigests.talesignal.com/posts/why-do-first-impressions-fade-on-lmarena-after-launch-week

The AI Models Index tracks premium AI releases from 15 labs since 2023, with verified launch dates and blind-vote checks to ensure reliability. Updated biweekly, it shows a 56% improvement rate between GPT-5.1 and GPT-5