How Thomson Reuters Uses Claude in Amazon Bedrock to Power CoCounsel
Thomson Reuters integrated Claude via Amazon Bedrock into its AI platform, CoCounsel, to make the expertise of 3,000+ subject matter experts and 150 years of authoritative content accessible to legal and tax professionals. The solution combines Retrieval-Augmented Generation (RAG) architecture with multi-model deployment to deliver comprehensive, accurate professional analysis. Early adopters report dramatic efficiency gains, with some estimating task time cut in half or more.
Impact
3,000+
Subject matter experts' knowledge delivered via AI
150+
Years of authoritative content leveraged
50%+
Estimated task time reduction
Challenge
Thomson Reuters needed to make the deep expertise of 3,000+ subject matter experts and 150+ years of authoritative content accessible to legal and tax professionals at scale, while meeting extraordinarily high accuracy and reliability standards where incorrect advice carries substantial professional risk.
Solution
Thomson Reuters deployed Claude via Amazon Bedrock as the AI backbone of CoCounsel, building a comprehensive RAG architecture that processes complex legal and tax documents, with Claude 3 Haiku handling rapid processing and Claude 3.5 Sonnet powering deeper analysis, all within AWS's secure enterprise infrastructure.
Tools & Technologies
Amazon BedrockWhat Leaders Say
“We combine real expert human knowledge with advanced technology. We have experts across many different domains generating content and workflows. For us, AI is a tool to facilitate the distribution of that expertise through our software.”
“What drew me to Anthropic early on was their stance on safety and ethics—that really aligned with our core ideologies.”
“The risk of providing wrong advice is substantial, so our quality thresholds are extraordinarily high. The partnership with Anthropic has been exceptional—their guidance and support have helped our engineering teams maximize the models.”
“The continuity of services for our engineering teams is helpful—they can leverage data easily and use existing AWS playbooks. From a security and governance standpoint, it allows us to be more transparent with customers about how we're controlling AI.”
“Amazon Bedrock lets us test new models the day they're released. It's essential to our development process.”
“We've been able to leverage a number of Claude's features, such as prompt caching, for features we've been deploying.”
“There's tremendous value in giving professionals multiple sides and perspectives of complex problems. We're not just providing faster information access—we're delivering a more complete and comprehensive view of all sides of an issue.”
“We've been vocal about our AI investment as a strategic part of our products going forward. Our editorial workforce spends significant time building and curating content—we see tremendous potential to accelerate these processes with Anthropic's computer vision and tool use capabilities.”
“Outstanding... It's like having an associate lawyer ready to take on an endless number of delegated tasks and deliver it all in minutes.”
“From a time-saving perspective, I can easily see it cutting the time in half, maybe even more.”
“CoCounsel will become a foundational tool for our firm. Its efficiency is staggering and frees up more of my time to focus on higher-level, more strategic work.”
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Full Story
Thomson Reuters is one of the world's leading providers of information and technology solutions for legal, tax, and accounting professionals. With a content library spanning over 150 years and a network of more than 3,000 domain experts, the company holds an extraordinary depth of professional knowledge — but the challenge was making that expertise readily accessible to practitioners at the moment they need it most.
The company recognized that AI could serve as a powerful distribution mechanism for its institutional knowledge. However, the stakes in legal and tax work are exceptionally high: inaccurate guidance can expose clients and firms to serious risk. Thomson Reuters needed an AI partner whose capabilities and values aligned with their rigorous quality standards and commitment to responsible, trustworthy outputs.
After benchmarking multiple AI models against both automated and human expert evaluations, Thomson Reuters selected Claude, deployed through Amazon Bedrock. Three factors drove the decision: Anthropic's safety-first philosophy matched Thomson Reuters' own values; Claude consistently cleared their demanding accuracy thresholds; and Amazon Bedrock's enterprise infrastructure offered seamless integration with existing AWS tooling, robust security controls, and the ability to test and deploy new model versions on release day. The team strategically deployed Claude 3 Haiku for high-speed processing tasks and Claude 3.5 Sonnet for deeper, more complex analysis, while also leveraging prompt caching to optimize performance and cost.
The result is CoCounsel, Thomson Reuters' AI platform that synthesizes expert knowledge to help legal and tax professionals deliver more thorough, well-rounded advice to their clients. Built on a comprehensive RAG architecture, CoCounsel processes complex contracts and tax documents, surfaces multiple perspectives on nuanced issues, and helps practitioners move from research to insight far more quickly. Customer feedback has been striking: one law firm partner described the efficiency gains as "staggering," while another estimated the platform could cut task time in half or more.
Looking ahead, Thomson Reuters is expanding its use of Claude into agentic workflows for complex tax processes and exploring computer vision capabilities to help editorial teams curate content more efficiently. The acquisition of Materia AI is expected to accelerate this roadmap, bringing agentic AI capabilities to CoCounsel's Tax, Audit, and Accounting users. Through its ongoing partnership with Anthropic and AWS, Thomson Reuters is working to fundamentally reshape how legal and tax professionals deliver strategic value to their clients.