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Humanity's Last Exam
Benchmark
Capability
2,500 expert questions with a deliberately final name.
You're looking at a benchmark record: a test the industry uses to measure chips or models — and what it actually tells you.
CAIS and Scale AI crowdsourced frontier-level questions across a hundred fields from domain experts. Launch (Jan 2025) frontier scores were 3–13%; by late 2025 leading systems with tools passed 40–50% — the benchmark named for the hope that there will not need to be another.
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Benchmarks
Sources
Record reviewed as of 2026-01-15 — see Methodology.