Filevine Introduces Anti-Hallucination for LOIS Legal Research

SALT LAKE CITY - September 1, 2026 - Filevine today unleashed anti-hallucination capabilities for case law within LOIS Legal Research, a powerhouse trust layer built directly into LOIS console designed to end guesswork in AI-assisted research. This release introduces three core initiatives: a proactive citation checker that verifies U.S. case law against trusted sources, opinion-content highlighting that links directly to supporting passages in source opinions, and opinion-scoped chat for focused analysis. Together, these features make source verification and deep investigation an integral part of the research workflow, rather than a separate task.

Courts are now hunting for AI errors. As attorneys face escalating sanctions for including fabricated case law within briefs, LOIS Legal Research shifts the power back to the lawyer.

The pattern underscores a fundamental reality for legal AI: the source matters as much as the answer. LOIS anti-hallucination destroys the two biggest dangers in legal AI, giving attorneys the confidence to move fast without fear: :

1. A citation hallucination occurs when the authority cited by an AI system does not exist.
2. A reasoning hallucination occurs where an authority is real but does not say what the AI claims it does.

Citation Hallucinations

Using the anti-hallucination citation checker, LOIS checks case law citations against its trusted sources before presenting the response to the attorney. Verified citations open the full opinion in a side panel with just a click. Unverified citations display a caution symbol to alert the user to further investigate the citation themselves.

It's included as a standard part of the process. LOIS automatically checks every case name in its output, eliminating the need to ask: which of these cases do I need to verify?

By automatically linking to verified cases and flagging those it can't verify, LOIS enables users to allot their time to high-impact tasks instead of needing to manually double-check every AI output from scratch.

Reasoning Hallucinations

The distinction between citation hallucinations and reasoning hallucinations is critical. Existence is not support. A verified citation confirms that LOIS can locate the authority; it does not establish that the case says what an AI tool claims it says. Attorneys remain responsible for reading and evaluating the authorities on which they rely.

When LOIS summarizes a case, it links directly to the supporting passage in the source opinion with the relevant paragraphs highlighted. This makes it significantly easier for the reviewing attorney to assess LOIS's interpretation of the case and application to the matter at hand.

By immediately flagging citations the system cannot verify and always putting the exact source one click from the answer, LOIS reduces the need to leave the research workflow to locate and check cited cases.

"Hallucinations remain a real threat in legal AI. No lawyer should have to risk a case, reputation, or license on an answer they cannot verify," said Ryan Anderson, CEO and co-founder of Filevine. "LOIS takes lawyers straight to the source, so they can move faster without giving up judgment or control."

See what verifiable legal AI looks like. Join Filevine CEO and co-founder Ryan Anderson on September 10 for From Risk to Reliability: Check the Cite. See the Reasoning. Read the Opinion., a live demonstration of how LOIS checks citations, connects lawyers directly to primary sources, and makes verification part of the work rather than an afterthought. Register now, or learn more about LOIS Legal Research.

About Filevine

Filevine, Inc. is headquartered in Salt Lake City, Utah, with offices around the world. As the legal industry's definitive system of record, Filevine differentiates itself from fragmented, point-solution tools by uniting contracts, matters, documents, research, and workflows into a single platform built for modern legal teams. Its Legal Operating Intelligence System (LOIS) delivers seamless, end-to-end control across every stage of the legal lifecycle.

Law firms, enterprises, and government agencies rely on Filevine to manage complex legal work with precision, security, and institutional intelligence. Recognized as a leader in Legal AI, Filevine has been honored by the LegalTech Breakthrough Awards, The SaaS Awards, Deloitte Technology Fast 500, and the Business Intelligence AI Excellence Award (2025). Today, thousands of organizations trust Filevine to eliminate fragmented software and deliver measurable outcomes across their practices.