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Humanity’s Last Exam
Expert questions at the frontier of human knowledge.
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What it measures
A broad academic benchmark of questions contributed by subject-matter experts worldwide and filtered to be hard for frontier models. This board runs it with web search enabled.
Beyond public benchmarks
Get a private eval built for your model.
HLE shows what expert-written questions can do. We run the same playbook privately: vetted specialists writing and grading questions no model has seen.
- Unpublished tasks written by vetted US-based subject-matter experts
- Rubric-based grading with expert review, not just automated scoring
- Delivered under NDA, with training data to close the gaps it finds
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