OpenAI just launched an AI business platform. Microsoft 365 firms already have one.

If your firm runs on Microsoft 365, you already own the thing OpenAI has just started building.

At its DevDay event on 29 September 2026, OpenAI launched always-on agents called dots, a shared team workspace called ChatGPT Space and tighter admin controls. Some AI commentators are already calling it the first proper AI business platform, and one widely shared video called it the one AI update a business can’t ignore. Then it gave Microsoft a single sentence.

That sentence is the story for most UK professional services firms. Every piece OpenAI announced has a Microsoft 365 equivalent, and those equivalents already sit on top of your files, your permissions and your compliance setup. Microsoft is now turning Copilot into the front door to all of it. The firms that get ahead won’t be the ones that move house. They’ll be the ones that learn how the house they already own now works.

What OpenAI actually launched

OpenAI’s pitch is that ChatGPT stops being one person talking to a chatbot and becomes a place a whole team works alongside AI agents. Four pieces carry that pitch.

• Dots. Always-on agents running on OpenAI’s GPT-6 Astra model. Each has its own cloud computer and browser, can connect to over 4,000 apps through plugins and keeps working on your goals between conversations. You set rules for what it can do alone, what needs your approval and what is blocked. You start with one dot per person, with teams of dots promised later.
• ChatGPT Space and Pages. A shared home for a team’s documents and files, where people, ChatGPT and dots edit the same page together. It replaces ChatGPT’s old Library.
• ChatGPT in Slack and Teams. You can message your dot from Slack or Microsoft Teams as well as from ChatGPT, and it carries context across all three.
• Admin controls. Workspace admins manage which plugins and apps are allowed, and Enterprise customers get policies for what agents can touch. OpenAI is also piloting “specialist dots” for businesses, each with its own identity and credentials for a defined job.

On cost, your first dot is included with a ChatGPT Business Premium seat at $125 per user per month on monthly billing, or $100 billed annually. A Standard seat, which gets Space but no dot, is $25 a month or $20 annually, and a Business workspace needs at least two seats. These are OpenAI’s US dollar list prices, and local pricing can vary. UK businesses can use dots on Business Premium today. Only personal Pro accounts in the UK, EEA and Switzerland are excluded for now.

Every piece has a Microsoft 365 equivalent

Put the two side by side and the Microsoft column is already full. Some of it is in preview, but none of it asks you to move your files anywhere.

The last row is the telling one. OpenAI says it is working with Microsoft so businesses can manage specialist dots through Agent 365, using the Microsoft tools they already have.

The hard part is context and control, and you already own it

AI that works across a whole team needs two things: shared context, so every person and agent knows the business, and control over who sees what, what agents can touch and what they did. Even the enthusiasts admit the control side is the hardest part of every build.

OpenAI is building both from a standing start. Space is brand new, so your documents have to be moved in or linked, and its sharing rules have to be learned and policed from scratch. A file linked from Google Drive keeps Drive’s permissions, but anything copied onto a page is visible to everyone who can open that page.

Microsoft 365 firms start years ahead. Work IQ doesn’t create new access: it inherits the permissions, sensitivity labels and data loss rules your tenant already has, and every request runs as a specific user who only sees what they’re allowed to. Agents get their own Entra identity, with Purview protecting the data they touch and Defender watching what they do, all managed through Agent 365, which is a paid add-on.

There is a catch, and it’s an honest one. Because Copilot respects your permissions, it will happily surface anything that’s overshared today. Microsoft’s own deployment guidance makes fixing oversharing step one, using SharePoint Advanced Management and Purview, and firms with Copilot licences already have most of those tools. That clean-up is real work, but it’s work on a platform you already pay for, not a migration.

Microsoft is already calling Copilot the operating system for work

Microsoft 365 has quietly been the operating system of the working day for years: email, files, meetings, chat, identity and security in one tenant. Microsoft now says so out loud, with Copilot as the way in.

Satya Nadella first trailed a Copilot “super app” in July, telling investors it would ship this quarter. It arrived on 25 September, four days before OpenAI’s event, with the Copilot app rebuilt around three parts:

• Home, where Chat and Cowork come together, with Word, Excel and PowerPoint built into the experience.
• Code, where anyone can describe an app, dashboard or automation in plain English and have it built.
• Autopilot, a persistent agent that keeps working when you’re not.

Nadella’s own description of it: “We’re building Copilot as a new OS for work”. Annie Pearl, Microsoft’s corporate vice president for Copilot, told Fortune the aim is for it to become “an all-in-one productivity suite”. Copilot as the operating system for Microsoft 365 isn’t a consultant’s metaphor. It’s Microsoft’s stated strategy.

There’s a second advantage that gets less attention. Microsoft isn’t tied to one AI lab. Copilot Cowork runs on Anthropic’s Claude models, while OpenAI’s GPT models sit in the Copilot model picker. A firm on Microsoft 365 gets the best models as they arrive without betting the business on any one of their makers.

What’s live and what isn’t

Both sides announced more than they’ve shipped, so it pays to separate the two.

On OpenAI’s side, OpenAI’s own help pages say self-updating pages in Space aren’t available at launch, shared slides and spreadsheets are “coming soon”, and pages can be read but not edited on mobile. Dots start with one per person, and OpenAI warns they can still make mistakes, so consequential work needs reviewing.

On Microsoft’s side, Home and Code are rolling out through the Frontier early-access programme, and Autopilot and @Copilot in Teams are in private preview. Microsoft also drops things: interactive agents for Teams meetings was recently marked as cancelled on its roadmap. And the agent features on both sides increasingly bill by usage. Cowork already bills through Copilot Credits, with Code and Autopilot set to follow, while a dot’s heavier work draws down your ChatGPT allowance.

The honest summary: Microsoft’s direction of travel is clear, but treat anything in preview as a preview. What’s generally available today, Copilot Chat, Copilot in the Office apps, Cowork, Copilot Studio agents and Agent 365, is already more than most firms are using.

Should your firm switch?

For most UK professional services firms on Microsoft 365, no. Moving platform means buying new seats, moving your knowledge in, rebuilding permissions and retraining everyone, to arrive somewhere that is still building the parts you already have.

There are fair exceptions:

• You already live in ChatGPT and Slack. If that’s where your team works and Microsoft 365 is only email, OpenAI’s platform may fit better. Start with a two-seat Business workspace and test it before committing.
• You run on Google Workspace. Your files are in Drive, not SharePoint, so the Microsoft argument doesn’t apply. Google’s own answer is the one to watch.
• You want to experiment. Trying a dot alongside Microsoft 365 is cheap. Just keep client data out of it until you’ve checked what it can reach and where that data goes.

For everyone else, the question isn’t which platform to move to. It’s whether you’re using the one you’re already paying for.

The gap is know-how, not software

The platform is arriving in your tenant whether you act or not. What decides whether it pays off is whether your team knows how the pieces fit together and uses them on real work.

The same video that crowned OpenAI made this point well. Once platforms carry the capability, the value left for anyone helping a business is setup, strategy and teaching people to work through the system alongside their agents. We agree, and for Microsoft 365 firms that work can start now, with tools you already own.

That’s what we teach at FiveForward. Our sessions are hands-on and built around your firm’s own processes, never generic slides:

• Copilot in your workflows. Chat, Notebooks, Researcher and Copilot in Word, Excel, Outlook and Teams, applied to the work your team actually does.
• Cowork. Handing off multi-step tasks, setting up skills and knowing what it costs to run.
• Agents. What they are and where they fit, then building your own in Agent Builder and Copilot Studio, or having us build them for you.
• The guardrails. Every agent we help put live has a named owner, a one-page scope, least-privilege access to data, reviewed conversation logs and an off switch.

If you’d like to know where your firm stands, book a free 30-minute call. No pitch, just an honest look at what you have and what it could be doing.

Sources checked

Last checked: 5 October 2026.

• OpenAI, “Introducing dots”, 29 September 2026
• OpenAI Help Center, “ChatGPT Business overview” and seat pricing
• OpenAI Help Center, “ChatGPT Business release notes”
• eesel AI, “OpenAI Dots pricing: Pro, Business Premium and real costs”
• eesel AI, “ChatGPT Space explained: features, plans and what’s not live yet”
• Microsoft Official Blog, “Introducing the new Copilot with Home, Code and Autopilot”, 25 September 2026
• Fortune, “Microsoft unveils Copilot super app, targeting business users with AI agents”, 25 September 2026
• Martin Cid Magazine, “Satya Nadella: We’re building Copilot as a new OS for work”, 27 September 2026
• GeekWire, “Microsoft starts merging its Copilot consumer and business apps in advance of Super App rollout”
• Windows Forum, “Copilot Home, Code and Autopilot: Frontier rollout, security controls and usage-based billing”
• Microsoft 365 Blog, “Copilot Cowork is now generally available”, 16 June 2026
• Microsoft Learn, “Work IQ overview”
• M365 Admin, “Microsoft Agent 365 becomes generally available”
• Microsoft Learn, “Set up Microsoft 365 Copilot and assign licenses”
• A Guide to Cloud, “What’s new in Microsoft 365 Copilot: September 2026”
• Microsoft, AI at Work roadmap