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
- Gemini 4 Carbon · 55.769 · Nov 3, 2026
- Muse Spark 1.3 · 55.288 · Nov 3, 2026
- Claude Opus 5 · 55.288 · Nov 3, 2026
- Claude Fable 5.1 · 55.288 · Nov 3, 2026
- Gemini 4 Argon · 54.808 · Nov 3, 2026
| Model | Score | Date | Kind |
|---|---|---|---|
| Muse Spark 1.3 | 55.288 | 2026-11-03 | snapshot |
| Claude Opus 5 | 55.288 | 2026-11-03 | snapshot |
| Claude Fable 5.1 | 55.288 | 2026-11-03 | snapshot |
| Gemini 4 Argon | 54.808 | 2026-11-03 | snapshot |
| Muse Wonder Full | 53.365 | 2026-11-03 | snapshot |
| Muse Wonder | 50.481 | 2026-11-03 | snapshot |
| Claude Opus 5.5 | 50.481 | 2026-11-03 | snapshot |
| Claude Fable 5 | 49.519 | 2026-11-03 | snapshot |
| GLM 5.3 | 49.038 | 2026-11-03 | snapshot |
| Grok 4.6 | 48.077 | 2026-11-03 | snapshot |
| GPT-5.6 Sol | 48.077 | 2026-11-03 | snapshot |
| Claude Sonnet 5.5 | 48.077 | 2026-11-03 | snapshot |
| Qwen3 8 Max | 47.596 | 2026-11-03 | snapshot |
| Grok 4.7 | 47.115 | 2026-11-03 | snapshot |
| Mimo V2.6 Pro | 47.115 | 2026-11-03 | snapshot |
| Kimi K3 | 46.154 | 2026-11-03 | snapshot |
| DeepSeek V4.1 Flash 1017 | 45.192 | 2026-11-03 | snapshot |
| GLM 5.3 Flash | 45.192 | 2026-11-03 | snapshot |
| Hy4 Preview | 45.192 | 2026-11-03 | snapshot |
| Muse Spark 1.2 | 43.75 | 2026-11-03 | snapshot |
| Claude Opus 4.8 | 43.75 | 2026-11-03 | snapshot |
| Claude Haiku 5.5 | 43.75 | 2026-11-03 | snapshot |
| Claude Sonnet 5 | 41.827 | 2026-11-03 | snapshot |
| GLM-Legal | 41.827 | 2026-11-03 | snapshot |
| DeepSeek V4.1 Flash | 41.346 | 2026-11-03 | snapshot |
| GPT-5.6 Terra | 41.346 | 2026-11-03 | snapshot |
| Muse Spark 1.3 | 40.865 | 2026-11-03 | snapshot |
| DeepSeek V4 Pro 0813 | 40.865 | 2026-11-03 | snapshot |
| Step 5 Preview | 40.385 | 2026-11-03 | snapshot |
| GPT-5.5 | 40.385 | 2026-11-03 | snapshot |