arXiv AI

Ordinary, Reasonable Chatbots: Do AI Models Track Human Legal Judgments?

The paper investigates whether large language model (LLM) chatbots can emulate human legal judgments of reasonableness. By comparing responses from 26 LLMs to those of human participants across 25 legal scenarios, the study finds that chatbots generally track human answers but tend to produce more homogeneous, government‑ and corporation‑friendly responses and align more closely with white, male, older, and more educated respondents. The authors note that these patterns warrant further systematic research.

arXiv AI
Aug 6

Assessing and Explaining the Persuadability of Large Language Models as Legal Decision Tools

arXiv:2604. 26233v3 Announce Type: replace Abstract: As Large Language Models (LLMs) are proposed as legal decision assistants, and even first-instance decision-makers, across a range of judicial and administrative contexts, it becomes essential to explore how they answer legal questions, and in particular the factors that lead them to decide difficult questions.

By Oisin Suttle, David Lillis
arXiv AI
Oct 21

Humans Correct Their Judgments Through Debate, but Weaker AI Models Do Not

The paper examines whether AI‑driven debate can help humans and weaker language models (LLMs) correct their judgments. Experiments show that debate improves human accuracy over prior beliefs, especially with weighted voting, but offers little benefit—and sometimes harms—accuracy for weaker LLM supervisors. The study highlights debate as a promising tool for scalable human oversight while questioning its effectiveness for fully automated AI control.

By Maria Victoria Carro, Denise Alejandra Mester, Facundo Nieto, Oscar Agustin Stanchi, Guido Ernesto Bergman, Giovanni Franco Gabriel Marrafini, Trinidad Borrell, Guido Freire, Joaquin Salvador Machulsky, Mario Alejandro Leiva, Ana Lopez, Nicolas Spinelli, Luca Nicolas Forziati Gangi, Eitan Sprejer, Federico Barrera Lemarchand, Gerardo Simari, Maria Vanina Martinez
arXiv Computation and Language
Sep 10

When Does Defendant Statement Matter? A Study of Bias and Persuasion in LLM-Simulated Jurors

The paper investigates how a defendant’s courtroom statement influences decisions made by large language model (LLM)–simulated jurors. Using the newly introduced JuryBench benchmark, the authors analyze 432,000 verdicts from 20 frontier LLMs, varying defendant background, emotional appeal, and rebuttal content. Results show that emotional persuasion can backfire, that jurors are harsher toward defendants from different backgrounds and more lenient toward same‑background defendants, and that juror ideology strongly shapes verdict severity.

By Cho-Ying Wu
Hugging Face Trending Papers
Oct 8

Cited but Not Consulted: A Counterfactual Audit of Legal Chain-of-Thought Faithfulness

Large language models often justify legal decisions by citing statutes or precedents, but this study shows that while models correctly name the governing authority 66.7%-100% of the time, the actual verdict rarely changes when the cited authority is swapped—only 0.0%-21.7% on CaseHOLD, 30.0%-76.7% on ECHR and SCOTUS, and 43.3%-50.0% on ContractNLI. This gap persists across models of different sizes and even a purpose‑built legal‑reasoning model. Additionally, a red‑team evaluation revealed that models are more compliant with hidden adversarial instructions than they are sensitive to verdict changes, indicating that citing legal authority is a weak proxy for genuine reasoning and that verdicts remain vulnerable to manipulation.

arXiv AI
Aug 19

Can LLMs Reason in a Legally Meaningful Manner? A Small-scale Study on European Court of Human Rights Cases

The study examines whether large language models (LLMs) can perform legally meaningful reasoning by testing OpenAI GPT 5.4 on European Court of Human Rights case forecasting. Using various prompting strategies, the authors find that the model produces structurally complete but substantively shallow analyses, and that LLM-as-a-Judge evaluators are internally consistent yet only weakly aligned with human annotators. The expert-curated prompt yields more comprehensive reasoning but does not improve prediction accuracy, leading the authors to caution against relying solely on automated LLM evaluation or using task accuracy as a proxy for reasoning quality.

By Amogh Raina, Ilias Chalkidis, Daniel Hershcovich, Henrik Palmer Olsen
arXiv AI
Oct 19

LexPilot: Benchmarking the Proactive Interaction Ability of Legal LLMs with Laypeople in Chinese Civil Case Consultation

LexPilot is a new benchmark that evaluates how well legal large language models (LLMs) can proactively interact with laypeople during underspecified Chinese civil case consultations. The dataset contains 432 real judgments from 36 common causes of action, paired with expert‑reviewed consultation histories that range from complete to underspecified, and the corresponding court verdicts. Experiments show that current LLMs perform poorly in proactive interactions, with downstream judgment prediction dropping by an average of 23.84% compared to fully specified consultations, highlighting key bottlenecks in user‑centered legal AI.

By Wenbin Zhang, ShangZhan Li, Bingxiang He, Ye He, Yuxin Zhou, Muzhen Cai, Qi Shi, Wanxiang Che