The AI Models Index tracks premium model releases from 15 top labs since 2023,...

https://ace-wiki.win/index.php/Which_Weekday_Do_AI_Labs_Usually_Ship_New_Premium_Models%3F

The AI Models Index tracks premium model releases from 15 top labs since 2023, verifying release dates and using blind-vote checks for accuracy. Updated biweekly, it shows releases now come every 4.5 days—a 56% faster rate. Recent highlights include GPT-5