The AI Models Index tracks development cycles and performance shifts, showing...

https://zaneznae304.lucialpiazzale.com/is-gpt-5-2-actually-worse-than-gpt-5-1-in-blind-votes

The AI Models Index tracks development cycles and performance shifts, showing that new releases now drop every 4.5 days on average. Between 2025 and 2026, models saw a 56% rate of improvement in benchmarks but also a 16% regression rate