or he used a better version of stock fish
I beat stockfish
https://www.chess.com/live/game/5072949833?username=iamlordfa Wow... I KNEW it was way too good to be true. This is literally your ONLY game against Stockfish and you lost, so... thanks for the clickbait!
or maybe he used leela chess
yeah he made 0 mistakes 0 blunders and 0 missed wins so yeah