#Humanity's Last Exam

Humanity's Last Exam Explained: Where 2,500 Frontier Questions Come From and How to Read the Scores

HLE is the most-cited frontier reasoning benchmark: 2,500 cross-disciplinary questions finalized 2025-04-03 after bounty cleanup, published in Nature 2026-01-28, with a dynamic HLE-Rolling variant. Origins, dual scoring, citation rules.