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

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

The AI Models Index tracks premium releases from 15 labs since 2023, showing verified dates and blind-vote checks every two weeks. On average, new models like GPT-5.2 arrive every 4.5 days—a 56% faster pace than before