Running a model five times and keeping the best answer buys a higher benchmark score without buying a better model.

Research scientist at OpenAI

Um so if you say okay well we're going to instead of just running this model once we're going to run it five times and take the best of the five responses or like ask a judge which one it thinks is best then you can get much higher scores than that model. And so it's really easy to make something that looks a lot better on paper but is actually not better once you control for the amount of test time compute.