The AI Models Index tracks model releases and upgrade results, with verified...

https://jasperssuperbcolumn.trexgame.net/what-did-people-complain-about-with-gpt-5-2-s-writing-style

The AI Models Index tracks model releases and upgrade results, with verified public release dates and blind-vote checks to help teams compare versions before switching. Across 178 releases, a 16% regression rate makes the risks easier to weigh.