Claude arrives in Microsoft Word

Anthropic has put Claude inside Microsoft Word, letting paid business customers draft, edit, and review documents without leaving the app. (claude.com) The new Word add-in is in beta for Claude Team and Enterprise plans, and Anthropic says users can install it from Microsoft AppSource. CNET reported the rollout on April 13, 2026, after Anthropic announced it in a LinkedIn post. (marketplace.microsoft.com) (cnet.com) Inside Word, Claude can rewrite selected text, draft into an existing template, and leave edits as native tracked changes that users can accept or reject in Word’s review pane. Anthropic says it also reads comment threads and can reply in those threads after making edits. (claude.com) Anthropic says the add-in preserves heading styles, numbering, bullets, and defined terms, and it supports Word files in.docx and.docm formats. The Microsoft marketplace listing says the app can read and make changes to a document and send data over the internet. (claude.com) (marketplace.microsoft.com) The release extends Anthropic’s effort to put Claude inside the software people already use for office work instead of asking them to switch to a separate chat window. Anthropic already offers Claude integrations for Slack, and its site now lists add-ins for Word, Excel, and PowerPoint. (anthropic.com) (marketplace.microsoft.com) (anthropic.com) That puts Claude more directly against Microsoft’s own assistant in the same workplace software. Microsoft introduced Microsoft 365 Copilot on March 16, 2023, as an assistant embedded across Word, Excel, PowerPoint, Outlook, Teams, and other Microsoft 365 apps. (microsoft.com) Anthropic is pitching Word for work that depends on exact formatting and visible revisions, especially long documents with comments, cross-references, and negotiated language. Its examples include contract review, status memos, research briefs, and checking for broken references or inconsistent terms across a full document. (claude.com) (marketplace.microsoft.com) Anthropic also says Claude can carry context across its Word, Excel, and PowerPoint add-ins in one conversation, so a user can move between a document, spreadsheet, and presentation without starting over. That ties the Word launch to a broader enterprise push around office workflows rather than a standalone writing tool. (claude.com) The company is still framing the product as a tool that needs human review. Anthropic says Claude “can make mistakes” and tells users to review tracked changes before accepting them, especially in client-facing documents. (claude.com)