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

https://www.foxtrot-bookmarks.win/the-ai-models-index-shows-that-in-2026-new-ai-model-releases-are-coming-every

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