The AI Models Index shows a rapid pace of development with new models released...

https://andysexpertblog.nexorafield.com/posts/how-often-do-premium-ai-models-ship-in-2026

The AI Models Index shows a rapid pace of development with new models released every 4.5 days on average. It also reveals a 56% improvement rate, balanced by a 16% regression rate, indicating progress isn’t always linear