August brings CoCounsel Legal deeper into agentic drafting and further into the systems where legal teams already store and manage their work. This month’s releases center on three themes: an increasingly connected platform that reaches into firm document management systems and third-party tools like Claude, sharper analysis powered by Thomson Reuters own legal AI model, and a new agentic drafting experience purpose-built for litigators. Read on for what’s new.
Agentic AI Grounded in Deep Legal Expertise
The next generation of CoCounsel Legal (US)
The next generation of CoCounsel Legal has launched in the U.S. A complete rebuild of CoCounsel Legal, it’s engineered to work at the level of a senior associate, reasoning through legal issues the way an attorney does and grounded in authoritative Westlaw primary law, trusted Practical Law guidance, and your firm’s own knowledge. Describe a matter in plain language, whether it’s contract review, litigation strategy, deal structuring, or sifting thousands of discovery documents, and CoCounsel Legal handles the rest. It develops the approach, works through each step, and links every citation so you can verify it yourself. You can give each matter its own workspace, keeping documents, templates, and conversations together. It also meets you in the tools you already use, including Microsoft 365 and Claude. Your data always stays your firm’s — private, and never used to train models. This is Fiduciary-Grade AI™ your firm can stake its reputation on.
Learn more at CoCounsel Legal.
Westlaw Brief Builder (US)
A transformation of research and drafting, Westlaw Brief Builder helps litigators move from research and issue analysis to first-draft brief creation while validating authority along the way. It follows a workflow purpose-built for briefs, guiding the drafter through each stage of the process in a way that litigators actually think and work — an organized, connected experience developed and validated by attorneys. Powered by Westlaw Deep Research, KeyCite, and Practical Law — authority no other legal AI can match — it proposes relevant facts, arguments, and supporting authority while keeping lawyers firmly in control of strategy, legal theory, and final decisions. And because output is verified against the law and the facts, then surfaced for review and confirmation, Westlaw Brief Builder delivers briefs not only faster, but briefs you can stand behind.
Global Connected Platform
Firm Document Management Connectors via Syncly (US, UK & Canada)
Admins can now connect CoCounsel Legal directly to a firm’s document management system through new Syncly connectors, including iManage on-prem, iManage Cloud, and SharePoint. Once connected, CoCounsel can access and act on firm content directly, with a connector icon appearing for end users wherever a connection is active — simplifying the ability to bring trusted firm documents into AI-assisted research, analysis, and drafting without leaving the platform.
Expanded CoCounsel Legal MCP with Claude (US)
CoCounsel Legal’s MCP connection with Claude is expanding. What started with Deep Research now extends to research, analysis, and drafting, bringing more of CoCounsel Legal’s fiduciary-grade AI capabilities directly into Claude. Lawyers can describe a matter in plain language inside Claude, and CoCounsel Legal plans the work — reasoning from authoritative Westlaw primary law, trusted Practical Law guidance, and a firm’s own knowledge — and returns cited, traceable work product without leaving Claude.
Tabular Analysis Enhancements in CoCounsel Legal (US)
Tabular Analysis is evolving. In the newly launched version of CoCounsel Legal, bulk document review is now built directly into the workspace — no more exporting files or rebuilding a separate database to review a subset. Creating and editing tables is simpler too, with a redesigned experience built from direct customer feedback, and multiple tables can now share the same set of files instead of duplicating work for each one. Tabular Analysis also runs by default on Thomson, Thomson Reuters own purpose-built legal AI model — the organizational and technical foundation for a more connected CoCounsel Legal.
Built for How You Work
Verbatim Extraction in Tabular Analysis (US, UK & Canada)
Attorneys building disclosure schedules, privilege logs, and red-flag memos need exact clause language, not paraphrases. A new Verbatim column type in Tabular Analysis returns exact source text instead of AI-generated summaries, so attorneys no longer need to reopen the original document to re-quote a clause. Users select “Verbatim” when configuring a column and describe what to pull; CoCounsel returns the exact language from the source, validated against the document, and clicking any cell opens the source with the precise span highlighted for verification. Exports carry the verbatim text into Word and Excel with quotation marks already applied, ready for partner review and closing binders.
Judicial Experience on CoCounsel (US)
A new, personalized CoCounsel environment is now available for trial, appellate, and supreme courts. When judges or clerks activate the Judicial setting, the application adapts to their role with a neutral-stance default and a suite of curated judicial workflows, including pro se brief standardization, statute of limitations checks, cross-brief issue synthesis, and case fact drafting — every output grounded in trusted Westlaw and Practical Law content, with hyperlinked citations and KeyCite verification for auditable, defensible decisions.
Thomson – New Proprietary LLM (US, Canada & UK)
Thomson, the first proprietary large language model built by Thomson Reuters draws on decades of proprietary content from Westlaw, Practical Law, Checkpoint, and Reuters plus hundreds of subject matter experts to reach Fiduciary-Grade™ standards at a fraction of typical cost. Early evaluations, including external testing by legal and AI academics, put Thomson on par with leading frontier models, particularly in instruction-following and domain-specific legal reasoning, and the model is now being deployed first in Tabular Analysis within CoCounsel Legal, with plans to extend Thomson across the legal and tax portfolio alongside additional sovereign AI options.
Learn about the Thomson LLM here.
Deep Research Verify in Practical Law Premium (UK)
Deep Research Verify is now available in Practical Law Premium, integrated directly into the existing Deep Research workflow. Verify lets users review specific AI-generated legal assertions against relevant supporting passages from underlying Westlaw UK and Practical Law sources, with source support displayed inline alongside the original report. By reducing manual cross-referencing and providing a direct route to further research, Verify helps legal professionals assess AI-generated research more efficiently, transparently, and confidently.
Deep Research Verify in CoCounsel (UK)
CoCounsel UK now offers the ability to verify a Deep Research report directly within the platform. Deep Research Verify checks a Deep Research report against Practical Law and Westlaw UK’s authoritative sources, confirming citations are accurate rather than hallucinated and surfacing additional relevant law the report may have missed — moving users through verification faster and giving them more links to explore for further research.
Westlaw Advantage Canada — Parallel Search (Canada)
Parallel Search is a new feature in Westlaw Advantage Canada that finds cases with facts or issues similar to a scenario described in plain language — not just documents matching the words in a query. Users describe a fact pattern or issue in a sentence, and Parallel Search surfaces up to 25 Canadian cases with analogous facts or reasoning, helping researchers find true comparators and surfacing analogous outcomes they might otherwise miss, especially on novel or hard-to-phrase issues.
Deep Research Verify in Westlaw Advantage Canada and CoCounsel Legal (Canada)
Deep Research Verify is now available within the Deep Research experience on Westlaw Advantage Canada and CoCounsel Legal. For each assertion in a Deep Research report, Verify presents supporting text from the cited source and flags where support may be lacking, with a clear path for additional manual verification — helping users review AI-generated research with greater confidence and less manual cross-referencing.
Explore These New CoCounsel Legal Features Today
Sign in to CoCounsel Legal today to put these new research, drafting, and document-management capabilities to work, or explore training options at the CoCounsel Legal Product Training site.
To learn more, please visit the CoCounsel Legal web page.
