The AI Models Index keeps tabs on premium releases from 15 labs since 2023,...

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

The AI Models Index keeps tabs on premium releases from 15 labs since 2023, with verified dates and blind-vote quality checks, refreshed every two weeks. In 2026, we've seen an average of one new release every 4.5 days—a 56% faster rollout pace