ChatGPT for Word Turns On by Default October 1: What Workspace Admins Should Set

ChatGPT for Word becomes enabled by default on October 1, 2026, for ChatGPT Business, Enterprise and Edu workspaces. OpenAI announced the add-in on September 17. It bills by the token, at API model rates, from the same allowance and credit pool your workspace uses for Codex.

This piece walks through what the add-in is, which plans get it, how usage is billed, and which two settings control it. One lives in the ChatGPT admin console. The other lives in the Microsoft 365 admin center. It also covers what the add-in reads, what OpenAI has not documented, and how it compares in shape with Copilot and Claude in Word.

The short version: decide before Thursday. If you want ChatGPT in Word, set spend limits so it cannot drain the pool your developers use for Codex. If you do not want it, turn it off in the ChatGPT admin console now, check the Microsoft 365 side, and look again on October 1 to confirm the setting held.

What ChatGPT for Word is

ChatGPT for Word is a Microsoft Office add-in. According to OpenAI’s help article, it "opens ChatGPT in a sidebar inside Microsoft Word." Users install it from Microsoft Marketplace, which some vendor documentation still calls AppSource. They open it from the Word ribbon and sign in with a ChatGPT account.

OpenAI lists five jobs for it. It drafts memos, proposals and reports from notes. It summarizes documents. It revises a section for a new audience. It reorganizes content and adjusts headings, numbering and formatting. It checks drafts for unclear language or inconsistent terms.

It is not a separate product from the Excel and PowerPoint tools. OpenAI’s FAQ says Word, Excel and PowerPoint "use the same ChatGPT Microsoft add-in." That detail matters for admins, and we come back to it below.

Conversations in the add-in stay separate from a user’s ChatGPT history. According to the same article, ChatGPT memory and skills do not carry over to the add-in.

Which plans get ChatGPT for Word, and what changes October 1

OpenAI posted the launch in three places on September 17. The consumer release notes say Word is available on all plans, including Free. The Business notes and the Enterprise and Edu notes each carry the same admin language and the same date.

The ChatGPT Business release notes say: "Workspace admins can turn Word access on or off in the ChatGPT admin console. Microsoft 365 admins must also allow the ChatGPT add-in. Starting Oct 1, 2026, Word access will be enabled by default." The Enterprise and Edu release notes use the same wording.

Two things are missing from those notes. They do not state the default today, before October 1. They also do not say whether a workspace that sets Word to off before October 1 keeps that setting. Both answers change what an admin should do this week. Treat the setting as something to verify on October 1, not something to set once and forget.

How ChatGPT for Word usage is billed on Business

Early coverage described Word as billed either at API rates or with credits. It is both, and the difference matters.

OpenAI’s Business notes say "Word uses token-based pricing at the API rates for the model you use." The Business and Enterprise/Edu rate card expresses those rates in credits per million tokens. So each request is priced by its input, cached input and output tokens. The workspace pays for it in credits.

Where the credits come from is the part admins should read twice. The rate card says a standard Business seat "includes ChatGPT and Codex." It adds: "ChatGPT Work, Workspace Agents, Excel, PowerPoint, Word, and Codex use a shared allowance and credit pool." Word does not get its own bucket. It spends from the same included usage your developers rely on for Codex.

Once included usage runs out, the workspace pool pays. OpenAI’s flexible pricing article says Business owners buy credits under Settings, Billing, and "credits are pooled across all users." If the pool is empty, "the feature is blocked," and users can ask an owner to add more. Enterprise and Edu buy credits at the contract level. When their pool runs dry, advanced features pause unless owners enable overages.

If the cost mechanics of input and output tokens are new to you, our explainer on input versus output tokens covers why output usually dominates the bill. Our look at the ChatGPT Business Premium seat covers the seat side of the same plan.

The rate card, in numbers

The Business rate card lists four models for the Office add-ins. OpenAI’s Enterprise token rate card lists the same four in dollars and says these features "are billed at API model rates."

Cached input runs at one tenth of the input rate on both cards. Every row on the two cards sits at the same ratio, 25 credits to one dollar. That is our arithmetic, not an OpenAI statement. None of the Business pages we read publish a dollar price per credit.

Here is a worked example using the published formula. Say a user asks for a summary of a 20,000-token document and gets 1,000 tokens back. On Terra, that is 1 credit of input plus 0.3 credits of output, or 1.3 credits. On Astra, the same request costs 6.25 credits. The model a user picks moves the cost by about five times. Real requests may carry more context than the document alone, so treat this as a floor.

Two switches: the ChatGPT admin console and Microsoft 365

ChatGPT for Word needs two approvals to reach an employee. OpenAI’s help article states both. Workspace admins turn Word on or off in the ChatGPT admin console. Microsoft 365 admins "must also allow the ChatGPT add-in so it can appear in Word for employees."

The October 1 change touches only the first switch. It does nothing to your Microsoft tenant. Whether it reaches users depends on what your tenant already allows.

That is where the shared add-in matters. If you already deployed or allowed the ChatGPT add-in for Excel or PowerPoint, the Microsoft side is likely already open. The same add-in serves Word. In that case the ChatGPT console toggle is the only gate left after October 1.

The Microsoft side has two relevant controls, per Microsoft’s add-in management documentation:

• Settings, Org settings, User owned apps and services: clearing “Let users access the Office Store” stops users from downloading add-ins from Microsoft Marketplace.
• Settings, Integrated apps: admins can deploy, disable or remove a specific add-in and change which users or groups it reaches.

Microsoft notes two limits. Users signed in with a personal Microsoft account may still reach the store. And the documentation does not say whether clearing the store setting removes add-ins users already installed.

How to turn ChatGPT for Word off before October 1

For workspaces that have not approved Word, these are the steps we would take this week, in order.

1. Set the ChatGPT toggle now. In the ChatGPT admin console, turn Word access off. OpenAI’s Word article does not name the exact menu path. For comparison, its Excel help article puts the Excel toggle under Workspace settings, then Permissions and roles.

2. Check Integrated apps. In the Microsoft 365 admin center, open Settings, Integrated apps. Look for the ChatGPT add-in. Note who it is assigned to, since that assignment covers Word as well as Excel and PowerPoint.

3. Check the store setting. Under Org settings, User owned apps and services, see whether users can access the Office Store. If they can, users can install the add-in themselves.

4. Re-check on October 1. Confirm the ChatGPT toggle still reads off after the default changes. Nothing OpenAI published says an explicit setting survives the switch.

5. Tell staff. Users who see the add-in in Excel may expect it in Word. A short note avoids help desk tickets.

Removing the add-in in Integrated apps also removes it from Excel and PowerPoint. If your staff use ChatGPT in Excel, use the ChatGPT toggle for Word instead of pulling the add-in.

Spend controls if you leave ChatGPT for Word on

Some organizations will want the add-in. Drafting memos and summarizing board packets are common jobs at associations and nonprofits. The goal then is to cap the cost, not block the tool.

OpenAI’s credits and spend controls article for Business describes three levers:

• Monthly credit limits by seat type: owners and admins can cap usage for Standard and Premium seats.
• Per-user overrides: raise or lower the cap for individuals, such as a developer who needs more Codex headroom.
• Auto top-up: set a minimum and target balance, with an optional monthly recharge limit.

None of these limits is specific to Word. A monthly cap covers everything the seat draws from the shared pool. So a heavy Word user can still spend the credits a Codex user expected to have. Watch usage for the first billing cycle after October 1 before loosening anything.

What the ChatGPT for Word add-in reads, and where it goes

According to OpenAI, the add-in works with the document you have open. It cannot reference other files on your computer, and OpenAI suggests pasting text into the prompt instead. Supported apps can bring in information from services such as Outlook, SharePoint, Google Workspace and Dropbox, so a connected app can widen what a request touches.

On training, the help article says that in Business, Enterprise and Edu workspaces, "inputs and outputs are not used to train OpenAI models by default." OpenAI’s business data page says the same for business plans.

The Word article does not state a retention period. The Excel article, for the same add-in, says some data logs "may be stored with OpenAI for 30 days for safety and integrity purposes." We would not assume that line applies to Word until OpenAI says so. If your organization handles donor, member or student records, ask OpenAI for the Word retention terms in writing.

OpenAI also lists known limits. Complex formatting, tables and charts may need manual fixes. The article also warns that ChatGPT "can make mistakes and change content you intended to keep." It advises saving a copy before large changes.

Excel and PowerPoint already run the same model

ChatGPT for Word is the third app on this add-in, not the first. The Business release notes show ChatGPT for Excel and Google Sheets reaching Business on May 5, with a free preview through June 2. ChatGPT for PowerPoint reached general availability for Business on July 6. Its usage was free through August 6, then moved to flexible pricing drawing on the workspace credit pool.

The rate card now groups Excel, PowerPoint and Word under the same token-based pricing. Word arrived straight into metered billing, with no free window. If your workspace already tracks Excel and PowerPoint spend, Word will land in the same reports and the same pool.

For background on how OpenAI splits ChatGPT into chat, agent and coding surfaces, see our explainer on the new ChatGPT: Chat, Work, and Codex.

If you also pay for Copilot or Claude

Many organizations on ChatGPT Business also license Microsoft 365 Copilot. Some also use Claude. All three now put an assistant in the Word sidebar, but they are sold in different shapes.

Anthropic’s Claude for Word documentation describes deployment through Integrated apps or a custom manifest. It does not describe a default-on date. We covered that add-in in how Claude works inside Microsoft Office.

The practical point for IT is inventory, not choice. Three Word assistants can mean three data paths and three bills. Microsoft’s own tooling for tracking agents across a tenant is covered in our piece on Microsoft Agent 365. Google is making a similar default change in Workspace, which we covered in Gemini’s default-on Workspace settings.

What we could not confirm about ChatGPT for Word

As of September 27, 2026, OpenAI’s pages leave several questions open:

• The current default: no page states whether Word is on or off before October 1.
• Whether “off” persists: nothing says an explicit admin setting survives the October 1 change.
• The menu path: the Word article names the admin console but not the setting’s location.
• Retention for Word: the Word article gives no retention period.
• Dollars per Business credit: not published on the pages we read.
• Supported Word versions: OpenAI’s article does not list platforms or builds.

We will update this post if OpenAI answers any of these.

Frequently Asked Questions