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Legal Agent Benchmark all-pass rate — Anthropic harness

Strict task success requiring every expert-written legal-work rubric criterion to pass.

1 models

Higher is better.

  1. 1Claude Opus 5Anthropic23.58
Higher is better. Bar colour: blue proprietary, orange open weights, green other.

About this benchmark

Metric
All-criteria pass rate
Tasks
1,235 legal-agent tasks
Authors
Harvey AI and Anthropic (2026)

Scores are as reported by model developers or evaluators and may use different settings (for example reasoning effort or tools). Compare with care.