Casetext develops CoCounsel, a professional-grade AI assistant for lawyers, powered by Openai’s GPT-4.1. It automates repetitive legal tasks like legal research, contract review, deposition preparation, and document drafting, allowing attorneys to focus on higher-level strategic work. In June 2023, Casetext was acquired by Thomson Reuters Corporation for $650 million.

Casetext

Non-Lawyer Friendly: Aimed specifically at legal professionals, so it’s not suitable for general consumers or non-lawyers.

No Mobile Apps: Currently, CoCounsel doesn’t offer dedicated mobile applications, limiting its accessibility on the go.

Speed and Efficiency: Significantly reduces time spent on legal research, contract analysis, and document drafting by automating repetitive tasks.

Accuracy: Powered by Chat GPT-4.1 and integrated with trusted legal sources like Westlaw, ensuring precise and reliable results.

Seamless Integration: Works well with Microsoft Word and Westlaw, making it easy for lawyers to incorporate AI into their existing workflows.

<h3><strong style="color: rgb(0, 0, 0); background-color: transparent;">Introduction</strong></h3><p class="ql-align-justify"><span style="color: rgb(0, 0, 0); background-color: transparent;">CoCounsel AI is a cutting-edge legal assistant powered by OpenAI’s GPT-4.1, developed by Casetext and now part of Thomson Reuters. Launched in 2023, it is designed to assist legal professionals with critical tasks such as legal research, contract analysis, document drafting, and deposition preparation. CoCounsel integrates seamlessly with platforms like Microsoft Word and Westlaw, offering a secure and efficient way for law firms and in-house legal teams to enhance productivity and accuracy. It is currently used by top-tier law firms and thousands of legal departments across the U.S.</span></p><h3 class="ql-align-justify"><strong style="color: rgb(0, 0, 0); background-color: transparent;">Performance in Legal Research</strong></h3><p class="ql-align-justify"><span style="color: rgb(0, 0, 0); background-color: transparent;">CoCounsel excels in legal research by combining OpenAI’s GPT-4.1 with Thomson Reuters’ Westlaw Precision, offering fast, accurate, and reliable legal insights. It can analyze thousands of cases in seconds, summarize relevant rulings, identify key precedents, and cite sources with precision. Unlike generic AI tools, CoCounsel is specifically fine-tuned for legal use, minimizing delusion and ensuring that citations and case law are jurisdiction-specific and up-to-date.</span></p><p class="ql-align-justify"><span style="color: rgb(0, 0, 0); background-color: transparent;">Key strengths:</span></p><ul><li class="ql-align-justify"><span style="background-color: transparent;">Deep integration with Westlaw for authoritative sources</span></li><li class="ql-align-justify"><span style="background-color: transparent;">Real-time updates on legal standards and precedents</span></li><li class="ql-align-justify"><span style="background-color: transparent;">Answers tailored to specific jurisdictions and contexts</span></li><li class="ql-align-justify"><span style="background-color: transparent;">Trusted by major U.S. law firms and legal departments</span></li></ul><h3><strong style="color: rgb(0, 0, 0); background-color: transparent;">Contract Analysis</strong></h3><p class="ql-align-justify"><span style="color: rgb(0, 0, 0); background-color: transparent;">CoCounsel AI offers fast and accurate contract analysis, automatically extracting key clauses, spotting risks, and summarizing legal terms. It helps lawyers quickly review documents, compare language to templates, and answer specific contract-related questions — saving time and reducing errors.</span></p><h3><strong style="color: rgb(0, 0, 0); background-color: transparent;">Document Drafting</strong></h3><p class="ql-align-justify"><span style="color: rgb(0, 0, 0); background-color: transparent;">Counsel AI streamlines document drafting by generating high-quality legal documents based on user prompts or templates. It assists with contracts, pleadings, and memos, ensuring consistency and legal accuracy. Integrated with Microsoft Word, it lets lawyers draft faster while maintaining the ability to edit the result.</span></p><h3><strong style="color: rgb(0, 0, 0); background-color: transparent;">Legal Translation</strong></h3><p class="ql-align-justify"><span style="color: rgb(0, 0, 0); background-color: transparent;">While CoCounsel is not specifically developed to perform translation, it can assist in translating passages and summarizing documents written in other languages. For instance, you can ask CoCounsel to translate a short message or summarize a document written in another language. Because it is integrated with Chat GPT-4.1, CoCounsel can read and comprehend documents in various languages, including, but not limited to, Arabic, Chinese (simplified and traditional), Japanese, and Korean.</span></p><h3><strong style="color: rgb(0, 0, 0); background-color: transparent;">Predictive Analytics</strong></h3><p class="ql-align-justify"><span style="color: rgb(0, 0, 0); background-color: transparent;">CoCounsel AI does not focus on predictive analytics. Unlike some legal tech platforms that attempt to forecast litigation outcomes or judge behavior, CoCounsel is designed primarily to assist with legal research, document drafting, and contract analysis — tasks that require precision, reasoning, and access to legal precedent.</span></p>

CoCounsel is a next-generation AI legal assistant powered by GPT-4.1 from OpenAI, offering solutions for legal research, document analysis, and contract drafting for legal professionals.