The deployment of AI in judicial settings has moved from theoretical discussion to practical implementation, with measurable results in real-world courts. One notable example is SARA, an LLM-powered legal reasoning platform deployed in a regional Brazilian court. This system integrates large language model agents with a Jurisprudential Knowledge Graph (Jur-KG), automatically extracting and structuring key elements from legal documents, including claims, requests, and evidence, then generating legal reasoning grounded in retrieved jurisprudential precedents. The deployment has demonstrated significant improvements in processing time, consistency, and explainability, while ensuring compliance with ethical and legal guidelines established by Brazil’s National Council of Justice.
The technical architecture behind such systems represents a significant advance in legal intelligence. The Jur-KG is modeled through an ontology encompassing core legal concepts such as parties, facts, and legal claims, enabling semantic matching and retrieval of relevant case law. By representing cases according to legal case ontologies, these systems support traceable reasoning and address competence questions to assess the coverage, coherence, and justification of AI-generated outputs. This approach demonstrates that combining LLM-based agents with domain-specific knowledge graphs can deliver both innovative capabilities and proven impact in judicial decision-making.
Globally, legal systems are exploring similar applications. Singapore’s judiciary has tested AI in Small Claims Tribunals to help self-represented litigants, while courts in the United States now require attorneys to disclose and verify AI-assisted filings. The legal aid sector has been particularly active, with legal aid organizations adopting AI at nearly twice the rate of the broader profession in 2025, using it to serve more clients, prepare materials faster, and stretch limited resources further. This focus on access to justice demonstrates that responsible AI deployment can expand legal services while strengthening professional judgment and client trust