Harvey AI is an artificial intelligence platform designed specifically for legal and professional services. Built on OpenAI's GPT technology and custom-trained on vast amounts of legal documents and case law, Harvey enables lawyers and legal professionals to draft documents, analyze contracts, conduct legal research, and automate repetitive tasks. The platform features a unified interface that combines conversational AI assistance with document management, workflow automation, and integration with professional tools like Word, Outlook, and iManage. Harvey uses model orchestration to intelligently route queries to the best data sources and workflows, reducing the need to switch between multiple tools. As of November 2025, Harvey uses GPT-5 as its default model for enhanced reasoning and writing quality.