Humanity's Last Exam — leaderboard

PhD-level questions at the frontier of human expert knowledge. Made by the same team behind MASK. Even top models show high calibration errors, revealing fundamental reasoning gaps.

Source: scale.com. Status: saturation imminent.

Interactive version: theaggregate.ai/benchmark?slug=humanity-s-last-exam · How the rankings work · Data refreshed daily, snapshot 2026-07-22.