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

https://rapid-wiki.win/index.php/What_Was_the_Biggest_AI_Model_Regression_Measured%3F

The AI Models Index shows that in 2026, new AI models are emerging every 4.5 days on average. While 56% of these releases bring measurable improvements, about 16% actually cause performance drops. Overall, the median gain on LMArena benchmarks is +9