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

https://stateofseo.com/how-do-i-cite-the-ai-models-index-october-4-2026-edition-properly/

The AI Models Index keeps tabs on premium model releases from 15 top labs since 2023, with verified dates and blind-vote quality checks. Updated biweekly, it shows releases now come every 4.5 days on average—a 56% faster pace