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

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

The AI Models Index tracks premium releases from 15 labs since 2023, with verified dates and blind-vote accuracy checks. Updated biweekly, it shows release speeds improved by 56%—now just 4.5 days between updates. Recent highlights include GPT-5