ChatGPT now runs inside Microsoft Word as a permanent sidebar. You can draft, rewrite, and reorganise a document without copying text into a separate chat window. OpenAI published the add-in through the Microsoft Marketplace on September 17. It is free to install on every ChatGPT plan, including the no-cost tier.
This is an OpenAI product, not a Microsoft one. It lives in OpenAI’s own help documentation. It’s managed from the ChatGPT admin console, not from Microsoft 365 admin settings. Your Microsoft 365 administrator still has to approve the add-in before it shows up in your Word ribbon, though.
What it actually does
Once installed, ChatGPT opens as a panel beside your document. You can ask it questions about the file you have open. You can select a paragraph and tell it to revise that section, or paste in rough notes and ask for a first draft. OpenAI’s own examples include turning notes into a client memo and writing an executive summary of a long document. It can also hunt down inconsistent terminology across a draft.
It works only on the document currently open in Word. It cannot reach other files sitting on your computer. If you want it to use another document as context, you have to paste that text into the prompt yourself.
How to install ChatGPT for Word
- Open the ChatGPT listing on Microsoft Marketplace and select Get it now.
- Follow the installation prompts.
- Open Microsoft Word, then click ChatGPT in the ribbon.
- Sign in with your ChatGPT account, choosing your organisation’s workspace if you have one.
- Open a document and type your request into the sidebar.
Word, Excel, and PowerPoint all share the same add-in. Installing it once covers all three apps. If you don’t see ChatGPT in the ribbon, check with your IT administrator. Organisations can block which Microsoft 365 add-ins are available to employees.
The part worth reading before you turn it on
OpenAI’s documentation makes one specific promise: in Business, Enterprise, and Edu workspaces, “inputs and outputs are not used to train OpenAI models by default.” That promise applies only to managed workspace accounts. The same page makes no equivalent statement for ordinary Free or Plus accounts. If you’re on a personal plan, check Settings > Data controls in your own ChatGPT account to see where your document text stands. This add-in’s help page won’t tell you.
There’s a second catch buried in the pricing section. Usage inside Word draws from the same shared allowance that covers Codex and other premium features on plans that include them. Drafting a long report or summarising a big document isn’t a separate free perk. It eats into the same monthly usage cap as everything else you do with ChatGPT.
Workspace administrators also need to know a date. Starting October 1, 2026, ChatGPT for Word switches on by default for managed workspaces that haven’t already decided one way or the other. Admins can still turn it off from the ChatGPT admin console. But the default is now “on,” not “off.” Anyone who wants it disabled needs to act before that date, not after.
Where it falls short today
OpenAI’s own limitations list is candid about the gaps. Complex formatting, tables, and charts often need manual cleanup afterward. The add-in can’t pull in other local files as context, either. It also warns, in its own words, to check “important facts, figures, citations, and edits” before sharing a document. That’s a reasonable caveat for any AI editing tool. Take it literally here: conversations in the add-in don’t carry over your ChatGPT memory or chat history from anywhere else.
Source: OpenAI Help Center
