Yesterday in AI: 11 April 2026 — Claude Invades Microsoft Office

Anthropic shipped Claude as a native Word sidebar for enterprise users, launched cloud-based Ultraplan for Claude Code, and Accenture invested in Replit to bring AI-native development to Fortune 500 engineering teams.

By OMC Editorial on 2026-04-12

Anthropic launched Claude as a native add-in inside Microsoft Word on Friday — entering the same productivity suite where Microsoft's own Copilot lives — while Accenture placed a bet on Replit and Claude Code gained a new cloud-based planning mode called Ultraplan. Claude for Word: Anthropic Enters the Office Suite Anthropic launched Claude for Word in public beta on April 11, 2026, putting a persistent AI sidebar inside Microsoft Word for Team $25/seat/month and Enterprise plan users on Mac and Windows. The add-in lets Claude draft, revise, and summarize .docx files without leaving Word, presenting edits as tracked changes — preserving the document review workflow that legal and finance professionals already use. Claude can also answer targeted questions about a document, locating specific clauses and returning clickable citations linked to the relevant section. Claude for Word connects with Claude for Excel and Claude for PowerPoint, meaning one conversation thread can span all three open Office documents simultaneously. Anthropic emphasized contract review and clause-location as initial use cases. Free and Pro plan users cannot yet access the add-in; broader rollout is expected in coming phases. Artificial Lawyerhttps://www.artificiallawyer.com/2026/04/11/anthropic-targets-lawyers-with-claude-for-word/ · Analytics Insighthttps://www.analyticsinsight.net/news/anthropic-launches-claude-for-word-revolutionizing-legal-review-and-financial-editing Claude Code Ultraplan: Planning Moves to the Cloud Anthropic also shipped Ultraplan on April 11, a research-preview feature for Claude Code that offloads implementation planning to a remote Opus 4.6 session, freeing the developer's local terminal. Triggered with /ultraplan followed by a task description, the cloud session researches your codebase and drafts a plan on claude.ai/code. The review interface lets engineers highlight individual sections and leave inline comments, react with emoji to flag approval or concern