OpenAI announced that ChatGPT has officially landed in Microsoft Word, allowing users to add ChatGPT to Word documents to transform rough notes into drafts, streamline complex paragraphs, proofread, and provide editing suggestions without leaving the document interface, and it can identify formatting issues. The feature is available simultaneously for Word, PowerPoint, and Excel, covering all ChatGPT subscription tiers, including Free, Go, Plus, Pro, Business, Enterprise, Edu, and K-12 institutional users, and is open for global use, with corresponding usage limits for each tier. In Excel, ChatGPT can build spreadsheets from scratch, analyze data across multiple worksheets and formulas, update existing workbooks, explain calculation logic, and create reusable workflows; in PowerPoint, it can generate complete slides based on notes or materials, optimize existing presentations, summarize presentation logic, and convert raw data into ready-to-use presentation pages while maintaining editability. Users install the ChatGPT app from the Microsoft Marketplace, open it in the Office add-in sidebar in Excel or PowerPoint, and log in with their OpenAI account linked to their ChatGPT subscription. Each task consumes between 20 to 110 credits, depending on scale and complexity, sharing the same token-based credit system as other ChatGPT functionalities. The current version does not support native chart editing, animation effects, complex templates, and custom fonts in PowerPoint; conversation history within the add-in will not sync with ChatGPT.com web history, and memory is unavailable. OpenAI also announced a two-week free preview of the GPT-5.6 Sol