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

https://technivorz.com/how-long-does-google-take-between-announcing-and-shipping-a-model/

The AI Models Index tracks premium releases from 15 top labs since 2023, with verified launch dates and blind-vote accuracy checks. Updated biweekly, it shows how model updates are speeding up—like GPT-5.2 arriving just 4.5 days after GPT-5