In brief
- Copilot lives inside the Microsoft 365 apps and grounds its answers in your tenant through Microsoft Graph.
- Claude connects to Microsoft 365 through a read-only connector and is stronger for deep reasoning, long documents and complex drafting.
- The camps overlap: Copilot now offers a model picker, with Claude models available alongside GPT in supported Copilot experiences.
- Neither trains on your business data by default under business plans.
- Many businesses run both, assigned by role: Copilot for everyday in-app assistance, Claude for heavier analysis and writing.
- Indicative licensing at the time of writing: Copilot from about A$33 per user per month; Claude Team from about US$25 per seat per month.
Where should AI exist in your environment?
Most Australian businesses now run their entire workday inside Microsoft 365: mail in Outlook, files in SharePoint and OneDrive, meetings and chat in Teams. When AI assistants arrive, the first question is rarely about models. It is about placement and control: which assistant can see your tenant’s data, what happens to that data, and whether the licence cost returns real hours.
Left undecided, staff answer the question themselves by pasting company content into whatever free tool they found first. That is the worst outcome: no governance, no audit trail, and no way to measure benefit. Choosing deliberately between the two serious contenders, Microsoft 365 Copilot and Anthropic’s Claude, avoids it.
What Copilot does well
Copilot’s advantage is placement. It sits inside Word, Excel, Outlook, PowerPoint and Teams, and grounds its answers in your tenant through Microsoft Graph, so it only surfaces content the signed-in user already has permission to see. Prompts and responses stay within the Microsoft 365 service boundary, and administration happens in the admin centre you already use.
It is at its best on everyday tasks: drafting a reply from a long thread, summarising a meeting, producing a first-pass deck. The trade-offs: answer quality depends heavily on tenant hygiene, since sprawling permissions surface sprawling content, and it is licensed per user on top of an eligible Microsoft 365 plan.
What Claude does well
Claude approaches the workplace from the other direction. It is a standalone assistant with deeper reasoning and stronger long-form writing, and it reaches your tenant through a Microsoft 365 connector that reads SharePoint, OneDrive, Outlook and Teams under delegated, read-only permissions. It cannot edit files or send mail on your behalf, and it only sees what the signed-in user can already access.
Where Claude earns its seat is sustained work: analysing a 100-page contract, comparing policy documents, building reports from many sources at once. The trade-offs: it lives in its own app rather than inside Office, and business controls such as single sign-on arrive on the Team and Enterprise plans, which carry a five-seat minimum.
Claude and GPT inside Copilot
The line between the two camps is blurring. Copilot now offers a model picker in supported experiences, with Anthropic’s Claude models (Sonnet 5 and Opus 4.8, with Fable 5 in preview) available alongside OpenAI’s GPT 5.5 in Researcher, Excel, PowerPoint, Copilot Studio and Copilot Cowork. Admins switch Anthropic models on from the Microsoft 365 admin centre, and staff choose the model that suits the task, or leave it on Auto.
The benefit is matching the model to the work without changing tools: Claude models for structured reasoning and document work, GPT for broad everyday queries. One governance point to review first: Anthropic models are served as a subprocessor outside the Microsoft-hosted boundary, so confirm you are comfortable with that data path before enabling them.
Side by side
| Microsoft 365 Copilot | Claude | |
|---|---|---|
| Works in | The Office apps you already use | Its own app, with connectors out |
| Tenant access | Microsoft Graph, permission-trimmed | Microsoft 365 connector, read-only |
| Data handling | Stays within the service boundary | No training on business data by default |
| Model choice | GPT and Claude models via the picker | Claude models, including Fable 5 |
| Strengths | Everyday in-app assistance at scale | Deep reasoning, long documents, drafting |
| Watch out for | Tenant permission hygiene | Five-seat minimum for business plans |
| Indicative cost | From about A$33 per user per month | From about US$25 per seat per month |
What frontier capability costs
Beyond per-seat licences, both ecosystems now bill their most capable features by consumption.
- Claude’s API is priced per million tokens. Fable 5, the current frontier model, sits at US$10 per million input tokens and US$50 per million output tokens, roughly double Opus 4.8. Businesses usually meet these rates through integrations and automation rather than chat seats.
- Copilot Cowork, Microsoft’s agentic desktop capability, needs a Copilot licence and then bills Copilot Credits for the work each task performs, at US$0.01 per credit pay-as-you-go, with committed-volume discounts. A task’s cost scales with the model chosen, the context retrieved and how long the agent runs.
The practical implication: budget frontier AI like a utility, metered and monitored, rather than as a flat licence.
Choosing well
For most Microsoft 365 businesses this is not an either-or decision. Copilot suits broad rollouts where the value is small time savings across everyone’s everyday tasks. Claude suits the people who spend their week in analysis and writing, where a single licence can return hours each day. The pattern that works: baseline the tasks that consume the most time, license the roles that own them, and review actual usage after six weeks.
Sybre runs this process end to end, from licensing and tenant readiness to governance and staff training. Contact us to talk through where AI assistance would actually pay for itself in your business.
Frequently asked questions
Does either tool train on our business data?
No. Copilot prompts and responses stay within your Microsoft 365 service boundary and are not used to train the underlying models. Claude's commercial plans do not train on your business data by default.
Can Claude see everything in our tenant?
No. The Microsoft 365 connector uses delegated permissions, so Claude can only read what the signed-in user already has access to, and that access is read-only.
Do we need particular licensing before adding Copilot?
Yes. Microsoft 365 Copilot is an add-on licence that requires an eligible Microsoft 365 business or enterprise base plan on the same tenant.
Can we run Copilot and Claude together?
Yes, and many businesses do. Assign each tool to the roles it serves best rather than licensing everything for everyone.
How do we know if it is paying off?
Baseline the hours your team spends on repetitive tasks before rollout, then measure again after six weeks. Our AI ROI calculator gives an indicative starting model.