The AI Models Index shows that in 2026, new AI models are released 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 released every 4.5 days on average. Despite frequent updates, 56% of these releases improve performance, while 16% cause regressions. On balance, models gain a median +9