OpenAI DevDay 2026: ChatGPT Space, Teams Integration and MCP Plugins Challenge Microsoft 365 Copilot

For Windows users and IT admins, the main points are three. ChatGPT is moving into Microsoft Teams. Its new slide tool can export to PowerPoint. And OpenAI is building a productivity suite that competes directly with Copilot-in-Office.

What OpenAI confirmed, and what only one outlet reported​

Some of these announcements have better sourcing than others, so it helps to separate them.

OpenAI's own recap calls the event its biggest DevDay, with more than 20 major announcements across ChatGPT, Codex, our models, and entirely new forms of working with AI. The company also said it is opening up ChatGPT as a shared surface where humans and agents can collaborate and where developers can directly launch new native experiences to our collective 1.2B weekly users.

That recap confirms Space, Pages and the upcoming slides tool. Several other details come mainly from The Decoder and could not be checked against OpenAI's own documentation:

• Pro 500 and the returning $200 plan
• The Meetings Plugin and its audio-deletion claim
• Team Tasks
• "Sign in with ChatGPT"
• The Enterprise Marketplace
• The license terms for the Teams and Slack integration

Those details are credited to The Decoder below.

Summary: OpenAI's recap backs the overall direction, a shared human-and-agent workspace with developer apps inside it. Pricing, the marketplace and the licensing details rest mostly on The Decoder's report for now.

Plugin Extensions: developer apps inside ChatGPT​

The Decoder calls Plugin Extensions the biggest change for developers. They let developers build interactive panels inside ChatGPT that users work in alongside a conversation, plus viewers for file types a plugin supports. A new "Plugin Creator" and a reworked submission process are meant to make building easier, with clearer feedback and better ranking in the directory. Users choose which plugins to install and approve what each one can access. The Decoder says the feature is on every ChatGPT plan.

Every's Vibe Check review describes the same feature as Full apps inside ChatGPT—called "plugin extensions"—with a directory and automatic recommendations in conversations to help users find you.

OpenAI's existing developer reference shows how this fits together. Developers are told to start with the open MCP Apps specification. ChatGPT-specific features are optional extras exposed through window.openai. That interface lets a widget call other MCP tools, upload files, open ChatGPT's file picker, request picture-in-picture or fullscreen, and open ChatGPT-owned modals. For tools that need approval, the reference says ChatGPT does not pass approval-gated arguments to the widget until the user approves the call.

For developers, this matters more than the "operating system" label. Code written against MCP Apps should carry over to other hosts, and only the window.openai extras tie you to ChatGPT.

The Decoder also reports that supported plugins can be embedded in user-created "Sites." Each team member uses the same app with their own data and permissions. Shareable profiles let creators show off Sites and plugins so others can reuse them. The Decoder ties this to OpenAI's hiring of Patreon co-founder Sam Yam to lead a new creator product division.

Space, Pages and Slides: an office suite built around agents​

ChatGPT Space is the team feature. OpenAI's recap describes it as a place where teammates, ChatGPT, and your dot can build on shared knowledge. ChatGPT can keep your space organized based on instructions you provide.

The Decoder calls "Dot" an AI assistant. Other coverage says dots are a bigger deal than that. According to CNBC, Dots are rolling out in ChatGPT for OpenAI's Pro and Business Premium users in eligible markets. Enterprise, Edu and Healthcare customers can try them once workspace admins turn them on. Engadget reports that Pro and Business Premium subscribers will get access to one free Dot, with the option to pay for more.

Reports differ on mobile support:

• The Decoder: Space is on desktop and web, with mobile coming later.
• OpenAI's recap: Space is Available to all Pro, Business, and Enterprise plans on the ChatGPT desktop app and web, with finding, reading, and sharing pages also available on mobile; mobile creation and editing are coming soon.

The OpenAI wording is more precise. You can read and share on a phone today, but creating and editing still need desktop or web.

Pages is the new document type. OpenAI says Anything you can do in ChatGPT you can do on a page: write, research, generate charts, create images, or visualize information. One keynote demo, reported by Pasquale Pillitteri, used a "Keep updated" switch that keeps a strategy page current by reading a Slack channel. A document that updates itself from a chat channel is handy. It is also something your data-governance team will want to review first.

Collaborative Slides hasn't shipped. OpenAI's recap only says that Soon you'll be able to create interactive slides with ChatGPT and your team, from a conversation or your own template. The Decoder adds that decks will support comments and export to PowerPoint or Google Slides.

Critics were quick to point at the obvious. Engadget's live blog said bluntly that ChatGPT Space is just an AI-heavy shared doc platform like Google Docs. Every's reviewer was more positive but warned that Dots has become the main way I use ChatGPT, but it's also been buggy and sometimes frustrating.

OpenAI has tried this before. The Decoder notes that it shut down multi-user shared chats in July, saying it wanted to keep ChatGPT simpler. Two months later it is launching a bigger collaborative workspace. Is that a change of mind or a better-built second attempt? The next few months will show.

Summary: Space and Pages are live for Pro, Business and Enterprise. Slides is still "coming soon." Dots availability is narrower than the Space rollout.

ChatGPT in Microsoft Teams: what admins should check​

This is the part that most affects Microsoft shops. Engadget confirms that ChatGPT is coming to Slack and Microsoft Teams too. The Decoder adds the details:

• People reach ChatGPT with an @ChatGPT mention in channels, threads or direct messages.
• Team members don't need their own ChatGPT license.
• ChatGPT uses tools an admin has connected, or the user's own tools where permissions allow.

Admins should read "no license needed" carefully. It means people without ChatGPT seats can still trigger an assistant that uses tools an admin connected. That is a governance decision, and it should be made on purpose.

OpenAI's help documentation for its existing Teams connector gives a sense of the controls OpenAI already uses. It has not confirmed that the new @ChatGPT bot works the same way, so treat this as context, not documentation for the new feature:

• Availability depends on several gates. They include the ChatGPT plan, location, workspace settings, the Microsoft account, and the organization's Microsoft Entra policies.
• Two different admins may be involved. A ChatGPT workspace owner controls which apps and actions are allowed. A Microsoft Entra admin grants the Microsoft Graph permissions those actions need.
• Approving permissions doesn't turn actions on. After Entra consent, ChatGPT admins still have to review Actions and Role access. Members may need to reconnect after new permissions are approved.
• Existing access rules still apply. The documentation says ChatGPT can't reach teams, chats, channels or meetings the connected Microsoft account can't already access.
• Write actions can require confirmation. ChatGPT may ask before sending a message or changing a Planner task.

If you're preparing for the new bot, the practical steps are:

• Audit which Graph scopes you have already consented to for OpenAI's application.
• Decide who in your organization owns the ChatGPT workspace admin role.
• Before users start @-mentioning a bot in Teams, work out what "admin-connected tools" would expose to someone without a ChatGPT license.

Meetings, MCP Events and Team Tasks​

The Decoder reports a Meetings Plugin that writes notes, summaries and action items into Space. Users can keep the output private or share it, then ask ChatGPT to update a project plan or draft a follow-up. OpenAI says audio is deleted once the summary is generated. The plugin launches in beta on macOS only, for Pro and Business users. The Decoder gave no Windows timeline, so Windows users will have to wait.

On automation, The Decoder says OpenAI is adopting the proposed MCP Events Specification. It lets plugins start automations when something happens in a connected app, on all plans. OpenAI's example is ChatGPT watching a project board, reading linked documents when new tasks appear, and drafting a plan while the user is away.

Team Tasks, for Business and Enterprise, lets teams hand off recurring work such as weekly updates. ChatGPT then responds on its own to triggers like new email or Slack messages.

The Decoder doesn't say which connectors support events, what safeguards apply, or how audit logging works. Event-driven agents that act while nobody is watching are exactly what security teams will ask about. Until OpenAI publishes those details, test in a sandbox before production.

Pricing, "Sign in with ChatGPT" and the Marketplace​

These details come from The Decoder alone:

"Sign in with ChatGPT" is the part to watch. The Decoder describes it as a push to make ChatGPT an identity layer for AI tools. That puts OpenAI next to Microsoft Entra, Google and Apple sign-in, at least for consumer and prosumer AI apps. The Marketplace works like the cloud marketplaces from Azure and AWS, where committed spend can go to third-party software. Anyone who has managed an Azure consumption commitment will find the model familiar.

What this means for Microsoft and Windows users​

This analysis is our own. Microsoft's bet is that AI gets added to the tools people already use: Word, Excel, PowerPoint, Teams and Windows. OpenAI's DevDay bet is the other way around. Work starts in ChatGPT, and Office formats and Microsoft apps are things you export to or connect.

The Teams integration and PowerPoint export show that OpenAI can't ignore where enterprise users actually work. They also put ChatGPT inside Microsoft's biggest collaboration product, where it competes with Microsoft 365 Copilot.

There are reasons to be skeptical:

• Slides isn't out yet.
• The Meetings Plugin is macOS-only and in beta.
• Dots availability is limited and, by at least one reviewer's account, buggy.
• Several enterprise-critical details are missing, including event safeguards, marketplace billing and the permission model for unlicensed Teams users.

For now, the practical advice is simple. Developers should look at MCP Apps and Plugin Extensions. Admins should check their Entra consent settings and ChatGPT workspace roles before @ChatGPT shows up in a Teams channel.

Update: TechCrunch reports Dots use cloud browsers and read-only background research (September 30, 2026)​

TechCrunch reports that OpenAI’s new Dots agents each run on their own cloud computer and browser, and can work with connected apps. That adds an important operational detail to the earlier description of Dots as task-oriented assistants.

According to TechCrunch, Dots can conduct proactive research in the background using connected applications in a read-only mode, while users retain approval over actions that make changes. For IT teams, that distinction matters: background access may still expose documents, calendars, project data, and other connected-service content even when an agent cannot write back automatically.

The report also says OpenAI describes the ecosystem as having more than 4,000 connected apps. Admins evaluating Dots should therefore treat connector governance, read permissions, retention, and audit visibility as core deployment questions—not just controls for send, edit, or delete actions.