AI契約書作成ツール

Contract drafting tools sit inside the program where lawyers already work, usually Microsoft Word. Examples include Spellbook, which runs as a Word add-in, and drafting features in broader legal AI products such as Harvey, Thomson Reuters CoCounsel and Lexis+ AI. Many contract lifecycle management platforms also let business users generate contracts from templates. Good drafts depend on three inputs the firm controls. A clause library holds approved language, often with variants for different risk levels or deal types. A playbook states preferred positions and acceptable fallbacks on issues such as liability caps, indemnities, termination rights and governing law. Precedents show how those positions were written in real signed deals. Tools that search these sources before generating tend to produce drafts that match firm standards. Tools that rely only on a model's general training produce language that sounds right but is generic. Drafting and review are different tasks. Review starts from a counterparty's document and asks what is risky, missing or off-standard. Drafting starts from the deal terms and must produce complete, internally consistent language. Drafting errors are harder to spot because nothing contradicts them. An omitted carve-out, an undefined term or a cross-reference to the wrong section looks fine on a quick read. Anyone checking an AI draft must compare it with the deal terms, not just read it for flow. Many people treat AI drafts as finished contracts, but they are first drafts. They may mix language from incompatible sources, introduce terms that are never defined, or quietly change a firm's standard position. Redlining against firm standards helps. When the tool shows tracked changes relative to the approved template, the lawyer sees exactly where the draft departs from vetted text and can concentrate there.