LongJud-Bench - Party Identification (First Instance): leaderboard
LongJud-Bench (LegalWorld, Zuo et al., 2026) makes a model the target lawyer in a simulated Chinese civil case, from client consultation to second-instance trial, with every other role played by Qwen3.5-Plus on a 100-case split. Party identification is scored on the first-instance complaint or defense the agent drafts, by exact match of its party identity and procedural slots against the case record, normalized to percent; higher is better.
Metric: Party Identification Score (%; exact match of party identity and procedural slots in the first-instance complaint or defense, normalized). Source: arxiv.org. Saturation forecast: Around February 2027. 6 models tracked.
Top models
| # | Model | Score | Overall rank |
|---|---|---|---|
| 1 | Kimi K2.5 | 80 | #252 |
| 2 | Qwen 3.5 Plus | 71 | #227 |
| 3 | DeepSeek V4 Flash | 64 | #254 |
| 4 | GLM-4.7 | 56 | #365 |
| 5 | GPT-5.2 | 53 | #172 |
| 6 | Qwen 3.5 Flash | 46 | #443 |
No result here: #1 Claude Fable 5.2, #2 Gemini 4 Carbon, #5 Claude Opus 5.5.
Interactive version: theaggregate.ai/benchmark?slug=longjud-bench-party-identification-first-instance · How It Works · Data refreshed daily, snapshot 2026-11-12.