The AI Models Index shows that in 2026, new AI models are coming out every 4.5...

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

The AI Models Index shows that in 2026, new AI models are coming out every 4.5 days on average, reflecting a fast pace of innovation. About 56% of these updates lead to improvements, but 16% actually cause regressions