The AI Models Index shows that in 2026, new models are released every 4.5 days...

https://yonderstack.com/s/5pTD8ocdGnTZAGPe2em2P

The AI Models Index shows that in 2026, new models are released every 4.5 days on average. While 56% of these updates improve performance, 16% actually cause regressions. Overall, median gains on LMArena benchmarks are about +9