Republicans did win control of the U.S. House in the November 2022 midterms, but their net seat gain was only 9 seats, not the roughly 44–51 seat pickup that Sacks cited and implicitly endorsed.

In 2020, Republicans held 213 seats and Democrats 222. After the 2022 elections, Republicans held 222 seats to Democrats’ 213, for a GOP net gain of +9 seats—just four seats over the 218 needed for a majority. (en.wikipedia.org)

So while the direction (Republicans win the House) was correct, the core quantitative claim in the normalized prediction—gains on the order of 44–51 seats—was off by more than 30 seats. Because that magnitude was central to the prediction (a big "red wave" versus the very narrow majority that actually occurred), the prediction is best judged as wrong.