Harvey Legal Agent Benchmark — leaderboard
Legal-agent benchmark for completing realistic legal workflows with all-pass grading, including held-out Harvey tasks and public legal-agent task sets.
Metric: All-Pass Task Success (self-reported). Source: benchmarklist.com. Status: saturation imminent. 11 models tracked.
Top models
| # | Model | Score |
|---|---|---|
| 1 | Claude Mythos 5 | 16.91 |
| 2 | Claude Mythos Preview | 13.4 |
| 3 | Claude Fable 5 | 13.3 |
| 4 | Claude Opus 4.8 | 10.4 |
| 5 | Claude Sonnet 5 | 8.92 |
| 6 | Claude Opus 4.7 | 7.1 |
| 7 | Claude Sonnet 4.6 | 5.4 |
| 8 | Claude Opus 4.6 | 4.2 |
| 9 | GPT-5.5 | 2.1 |
| 10 | Gemini 3.5 Flash | 0.8 |
| 11 | Gemini 3.1 Pro (Preview) | 0 |
Interactive version: theaggregate.ai/benchmark?slug=harvey-legal-agent-benchmark · How the rankings work · Data refreshed daily, snapshot 2026-07-22.