Overview

• Copilot Chat is now included at no extra cost in Word, Excel, PowerPoint, Outlook and OneNote, appearing in a right‑hand sidebar that adapts to the open file.
• The free in‑app experience runs on OpenAI’s GPT‑5, which Microsoft says is deployed with its enterprise security measures.
• Business customers gain the integrated assistant without additional licensing, after consumers earlier saw about a 30% price increase with an option to keep a classic plan.
• Starting October 2025, a Microsoft 365 Copilot app will be auto‑installed on Windows 11 devices that have Microsoft 365 desktop apps, with admin policy controls available.
• EU devices are exempt from the automatic installation, and a paid Microsoft 365 Copilot license adds capabilities like reasoning across organizational data, file uploads, image creation, faster responses and higher availability.