Benchmark Almanac

LEXam-hard

Not in model cards

Agents with legal research tools answer the 518 LEXam open questions that strong open models score lowest on. Questions answerable from memory or unanswerable from their text are removed.

A filtered copy of the LEXam open_question test split, joined back to LEXam by id.

Made by Joel Niklaus (LEXam co-author) Released Sep 2026 Law All tasks public
Level
Research frontier Researchers, on open problems or tasks that take days
Scored
Graded by a model A language model scores each response, usually against a rubric.
Answers
Open-ended Free-form text, documents, designs or media judged as a whole.

No scores here yet

No lab, leaderboard or Epoch AI run has reported a score for LEXam-hard yet.

No lab model card reports it yet

We read the headline results of 479 launch posts from 51 labs, and none of them list this benchmark.

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