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Legal Research Bench

As of Nov 3, 2026, Legal Research Bench (v1) is maintained by Vals AI. Metric accuracy (%). Ceiling 100. Saturation unknown. Contamination risk low.

Maintainer
Vals AI
Metric
accuracy (%)
Ceiling
100
Saturation
unknown
Contamination
low
Cadence
Declared cadence: as Vals updates (checked daily). Catalog snapshots: 1, latest Nov 3, 2026.
Source
Vals AI · this benchmark on Vals AI
Grading
AI judge (LLM-graded rubric) — All-pass on lawyer-written rubrics; every rubric item is checked by an LLM judge.
Partner-built
Fisher Phillips, McDermott Will & Schulte, Reed Smith, Legal Technology Hub

Source: Vals AI. A proprietary private test set run by Vals; scores are republished with permission. Rows are dated the day isitsota first saw them, and only the benchmark's standard harness counts.

Categories

Where it counts

  • Legal — primary, weight 1
Top 5

Current top scores

  1. Gemini 4 Carbon · 55.769 · Nov 3, 2026
  2. Muse Spark 1.3 · 55.288 · Nov 3, 2026
  3. Claude Opus 5 · 55.288 · Nov 3, 2026
  4. Claude Fable 5.1 · 55.288 · Nov 3, 2026
  5. Gemini 4 Argon · 54.808 · Nov 3, 2026
ModelScoreDateKind
Muse Spark 1.355.2882026-11-03snapshot
Claude Opus 555.2882026-11-03snapshot
Claude Fable 5.155.2882026-11-03snapshot
Gemini 4 Argon54.8082026-11-03snapshot
Muse Wonder Full53.3652026-11-03snapshot
Muse Wonder50.4812026-11-03snapshot
Claude Opus 5.550.4812026-11-03snapshot
Claude Fable 549.5192026-11-03snapshot
GLM 5.349.0382026-11-03snapshot
Grok 4.648.0772026-11-03snapshot
GPT-5.6 Sol48.0772026-11-03snapshot
Claude Sonnet 5.548.0772026-11-03snapshot
Qwen3 8 Max47.5962026-11-03snapshot
Grok 4.747.1152026-11-03snapshot
Mimo V2.6 Pro47.1152026-11-03snapshot
Kimi K346.1542026-11-03snapshot
DeepSeek V4.1 Flash 101745.1922026-11-03snapshot
GLM 5.3 Flash45.1922026-11-03snapshot
Hy4 Preview45.1922026-11-03snapshot
Muse Spark 1.243.752026-11-03snapshot
Claude Opus 4.843.752026-11-03snapshot
Claude Haiku 5.543.752026-11-03snapshot
Claude Sonnet 541.8272026-11-03snapshot
GLM-Legal41.8272026-11-03snapshot
DeepSeek V4.1 Flash41.3462026-11-03snapshot
GPT-5.6 Terra41.3462026-11-03snapshot
Muse Spark 1.340.8652026-11-03snapshot
DeepSeek V4 Pro 081340.8652026-11-03snapshot
Step 5 Preview40.3852026-11-03snapshot
GPT-5.540.3852026-11-03snapshot