The Launch
Thomson Reuters unveiled CoCounsel 2.0, a major upgrade to its Westlaw-integrated AI legal assistant. The headline feature is an autonomous research agent that can conduct multi-step legal research independently — receiving a legal question and returning a comprehensive research memo with verified citations.
Agent Capabilities
- Autonomous multi-step legal research across Westlaw's entire corpus
- Identifies relevant statutes, case law, and secondary sources
- Analyzes opposing arguments and counter-precedents automatically
- Generates structured research memos with Bluebook-formatted citations
- Tracks jurisdiction-specific nuances and recent precedent changes
Accuracy and Trust
Thomson Reuters reports a 99.7% citation accuracy rate, achieved by grounding all AI outputs against the verified Westlaw database rather than generating citations from a language model's training data. Every citation links to the verified Westlaw source, and the system explicitly flags when case law has been overruled or distinguished.
Pricing and Availability
CoCounsel 2.0 is available to all Westlaw Edge subscribers at no additional cost. Premium agent features (autonomous research, multi-jurisdiction analysis) require CoCounsel Pro at $250/user/month. Thomson Reuters reports 15,000 law firms already using CoCounsel 1.0.