OpenAI Video: How Sullivan & Cromwell Builds Legal Tools with Codex
OpenAI released a video showcasing how John Savva at Sullivan & Cromwell LLP uses Codex to build a tool called 'Agreement Analyzer'. This tool integrates drafts, precedents, and playbooks to identify issues and generate memos with tracked changes for lawyer review.
On October 26, 2026, OpenAI published a video detailing how the major U.S. law firm Sullivan & Cromwell LLP utilizes its technology to build internal legal tools. In the video, John Savva from the firm demonstrates the workflow for a tool named 'Agreement Analyzer'.
According to the episode description provided by OpenAI, Agreement Analyzer brings together draft agreements, selected precedents, and playbooks that reflect both the firm's and the client's positions. The tool is designed to identify potential legal issues and automatically returns a memo along with proposed tracked changes for a lawyer to review.
This workflow emphasizes the importance of human-in-the-loop processes. Lawyers can inspect the sources and explanations behind the findings, then accept, revise, or reject the proposed changes before advising the client. For readers interested in the practical application of AI in professional services, this video offers a concrete case study of how a top-tier law firm embeds large model capabilities into rigorous legal practice.