The AI Models Index tracks the pace and quality of AI releases, showing that...

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

The AI Models Index tracks the pace and quality of AI releases, showing that updates come every 4.5 days on average. Between now and 2026, 56% of model updates improve performance, but 16% actually cause regressions. On median, models gain about +9