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Legal Agent Benchmark

Frontier

Agentic legal-task benchmark measuring end-to-end legal work.

Domain
legal
Published
Jun 2026
Notable for
Legal agentic benchmark used at Claude Fable 5 launch.

Cite

Notes

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Attribution

Leaderboard scores
Anthropic
Attribution policy →

Top score 13.3% by Claude Fable 5 - 4 models reporting (3 frontier)

Score history

4
0%25%50%75%100%Feb 26Mar 26Apr 26May 26Jun 26Gemini 3.1 Pro PreviewGPT-5.5Claude Opus 4.8Claude Fable 5

Top models

4
Legal Agent BenchmarkBar chart with 4 bars. Highest value: Claude Fable 5 at 13.3.
4 models

FAQ

What is Legal Agent Benchmark?
Agentic legal-task benchmark measuring end-to-end legal work.
What is the current top score on Legal Agent Benchmark?
The top reported score is 13.3% by Claude Fable 5, across 4 models reporting (3 from frontier labs).