Thomson Reuters has expanded its partnership with Anthropic through a new Model Context Protocol integration that connects Claude directly to CoCounsel Legal. The integration allows legal professionals to move seamlessly between general‑purpose AI and citation‑grounded legal workflows, bringing fiduciary‑grade standards into environments where accuracy and verifiability are essential. The company positioned the move as a response to the widening gap between fast, convenient AI tools and the rigor required for professional legal work.
CoCounsel Legal is already used across law firms, corporate legal departments and government agencies, reasoning across billions of documents and KeyCite signals to deliver validated, traceable outputs. With the new integration, lawyers working in Claude can now access CoCounsel Legal’s authoritative content and workflows, enabling them to shift from exploration to execution without compromising professional standards.
The next generation of CoCounsel Legal is being rebuilt on Anthropic’s Claude Agent SDK, transforming the system into one that plans, selects tools, retrieves authoritative content and adapts mid‑workflow. Lawyers will be able to describe matters in plain language and receive fully cited, fiduciary‑grade work product. Thomson Reuters emphasized that its 175‑year foundation of curated legal content and expert validation remains central to the system’s reliability.
KEY QUOTES:
“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, Chief Product Officer, Thomson Reuters
“Integrating Claude with CoCounsel Legal brings together leading AI with trusted legal content and workflows, enabling users to move from exploration to execution with confidence.”
Scott White, Head of Product, Enterprise at Anthropic
“Legal professionals deserve AI they can trust with their most important work… wherever lawyers are working, the full power of CoCounsel Legal is available to them.”
Joel Hron, Chief Technology Officer, Thomson Reuters
