By Robb M. Stewart
Thomson Reuters is integrating Anthropic's Claude into its CoCounsel Legal artificial-intelligence tool.
The next generation of Thomson Reuters's legal-assistant platform is rebuilt on Anthropic's Claude Agent SDK, which it said marks a shift to a system that plans, selects tools, retrieves authoritative content, and adapts mid-workflow.
Lawyers will be able to describe a matter in plain language and have CoCounsel Legal pursue the right inquiry, draft with citations, and include validated references in the fiduciary-grade work product, it said.
CoCounsel Legal is already used by legal professionals across law firms, corporate legal departments and government agencies. With the latest version, Thomson Reuters said professionals will be able to move work between Claude and CoCounsel Legal's fiduciary-grade workflows.
The company said adoption of legal AI continues to accelerate, though alongside a widening gap between the speed and convenience of general-purpose AI and the accuracy and verifiability of professional-grade systems.
"Thomson Reuters is building CoCounsel Legal to be the fiduciary-grade system at the center of how legal work gets done, connected to the tools lawyers use and built to the standard their work demands," David Wong, Thomson Reuters's chief product officer, said.
Write to Robb M. Stewart at robb.stewart@wsj.com
(END) Dow Jones Newswires
May 12, 2026 13:43 ET (17:43 GMT)
Copyright (c) 2026 Dow Jones & Company, Inc.
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