The AI Models Index shows that throughout 2026, new releases dropped every 4.5...

https://deansinspiringperspective.hexaforgey.com/posts/did-gpt-5.2-actually-regress-in-chat-quality

The AI Models Index shows that throughout 2026, new releases dropped every 4.5 days on average, highlighting a fast pace of development. On average, 56% of these updates led to measurable improvements, while 16% caused some performance regressions