TR Launches ‘CoCounsel Legal’ With Agents + Deep Research – Artificial Lawyer

Thomson Reuters has launched what it’s calling ‘CoCounsel Legal’, which will include ‘Deep Research’ capabilities and support for agentic guided workflows.

And you may then say: ‘Sounds good, but don’t they already have a CoCounsel offering? Which is the new bit here?’ AL put that very sensible question to TR and they kindly explained the move.

‘CoCounsel Legal is the first time we are bringing [these capabilities] all together. It combines reasoning-capable AI, proprietary Thomson Reuters content, research tools like KeyCite and Precision Research, and workflow software.

‘This is not just another product feature. It is a unified AI system designed to support the full range of legal tasks in one environment. Over the past two years, we have introduced drafting, search, summarization, and retrieval tools powered by generative AI. CoCounsel Legal connects all of that into a single system.

‘What is new now is the full integration and the launch of Westlaw Advantage, which includes two new capabilities, Deep Research and Litigation Document Analyzer. New agentic guided workflows, which we previewed earlier this summer, are now live for select tasks, and we will continue rolling out more through the Fall,’ the legal tech giant explained.

So, there you go. Part repackaging, part product consolidation, part bringing in new capabilities – all under one brand name: CoCounsel Legal.

On the agentic point, TR added that: ‘It’s the first time agentic AI has been deployed this broadly across professional legal workflows, with the infrastructure and scale to support enterprise-wide transformation. Unlike AI copilots that sit beside the work, CoCounsel Legal is embedded in it.

And with regard to Deep Research, they added: ‘Deep Research in CoCounsel is the legal industry’s first professional-grade agentic AI research capability – built to reason, plan, and deliver comprehensive legal research results grounded in Westlaw and Practical Law content.’

It can:

• Generate multi-step research plans,
• Trace its logic with transparent reasoning,
• Deliver structured, Westlaw and Practical Law citation-backed reports.

I.e. it’s tapping the way that LLMs can now reason and act agentically – and show you what they have done – or plan to do. One could see this as TR making sure they’re in step with the ‘state of the art’ of genAI developments in the wider market, and applying those advances to their own content and product suite.

And clearly they are leveraging to the maximum their advantage in having a gigantic collection of legal data – and that’s a strategic play they will keep going back to because it will always be TR’s strongest hand – because no-one, other than LexisNexis, has a data store as large and comprehensive as they do.

The end result is that there is a lot going on here. And realistically you’re really going to have to have a try-out with this to see what it can do.

David Wong, Chief Product Officer at Thomson Reuters, concluded: ‘Guided workflows transform how professionals’ approach complex legal work, moving beyond simple prompting to sophisticated, multi-step task execution – and that’s a huge leap forward in what legal AI can deliver.’

—

Legal Innovators Conferences in New York and London – Both In November ’25

If you’d like to stay ahead of the legal AI curve….then come along to Legal Innovators New York, Nov 19 + 20, where the brightest minds will be sharing their insights on where we are now and where we are heading. 

And also, Legal Innovators UK – Nov 4 + 5 + 6

Both events, as always, are organised by the awesome Cosmonauts team! 

Please get in contact with them if you’d like to take part.