Copilot can now pick its own AI brain — what August's update means for your business
Microsoft Copilot's August 2026 update adds Claude model choice, Cowork workflows and Notebooks for all. What it means for business, plus the governance catch.
Microsoft's August 2026 Copilot wave is the biggest since launch: Copilot can now choose between AI models — including Anthropic's Claude — and Cowork lets it carry out whole workflows. Here's what actually matters for a business.
Most Copilot updates are incremental. August 2026's wave is not. Three changes in particular shift what Microsoft 365 Copilot is — from an assistant that answers, to a platform that selects the right AI engine for a task and then does the work.
What changed in the August 2026 Copilot update?
Microsoft's August 2026 Copilot update brings three headline changes for business users: model choice that includes Anthropic's Claude, Cowork workflow automation, and Copilot Notebooks for all users. Here is what each one does, and what Key IT thinks it means for Melbourne businesses on Microsoft 365:
Model choice.
Copilot now draws on multiple frontier AI models — the latest from OpenAI alongside Anthropic's Claude — and can match the model to the task, whether that is a long analytical report or a fast summary.
Cowork workflow automation.
Building on the agentic Cowork capability we covered earlier this year, teams can now build custom multi-step workflows on their own data — project tracking, resource allocation, report packs — with activation gated behind IT administrator approval.
Copilot Notebooks for everyone.
Notebooks — a workspace where Copilot reasons over a defined set of files — is now available to all users, and responses can surface images from your files and meetings inline.
What does model choice actually mean for you?
Model choice means the quality ceiling of Copilot just rose, without you doing anything. Different AI models are genuinely better at different work — one may write more naturally while another reasons more carefully over numbers. Copilot selecting between them per task is the kind of upgrade users feel as "it just got smarter". For businesses evaluating whether Copilot is worth it, this materially strengthens the yes case. There is a security upside too: when the approved tool is this capable, staff have fewer reasons to paste client work into unapproved public chatbots, the habit that creates shadow AI risk.
What is the governance catch with the new Copilot features?
The same update that makes Copilot more capable makes governance less optional. An assistant that answers questions can only leak what it is shown; an agent that executes workflows can act on it. Two things deserve attention before you switch the new capabilities on:
- Permission hygiene. Copilot respects your Microsoft 365 permissions — which means it faithfully exposes every over-shared folder and forgotten "Everyone" link. Tenants should be tidied before agents are unleashed. This is the core of our Copilot readiness work, and our free AI readiness assessment shows in a few minutes where your business stands.
- The admin approval gate is your friend. Cowork workflow activation requires IT approval by design. Use that gate deliberately: approve narrow, well-scoped workflows, and require a human checkpoint anywhere money moves or clients are contacted. Our safe AI adoption service sets these rules up properly.
Frequently asked questions
Do we need new licences for the August features?
The new capabilities land within Microsoft 365 Copilot licensing, though some agent and workflow features carry their own consumption or licensing considerations. We map this per client before anything is enabled — pricing surprises are avoidable.
Is Claude available in Microsoft 365 Copilot?
Yes. Microsoft 365 Copilot now draws on Anthropic's Claude models alongside OpenAI's, and the August 2026 update lets it pick the better model for each task. Your administrator decides which models are approved in your tenant, so check that setting before staff start relying on a particular one.
Can we choose which AI model Copilot uses?
Administrators get controls over model availability, and Copilot handles task-level selection. For most businesses the right posture is: let Copilot choose, but know which models are approved in your tenant.
Is our data used to train these models?
No — commercial Microsoft 365 Copilot data protections apply regardless of which underlying model serves a request. Your prompts and files stay within your tenant boundary and are not used to train the foundation models.
What are Copilot Cowork workflows?
They are multi-step jobs you set up once for Copilot to run on your own business data, such as a regular project status or report pack. Since the August update teams can build their own, but each workflow stays off until an IT administrator approves it, and Cowork still asks for a person's sign-off before it acts.
Should we turn Cowork workflows on now?
Pilot first. Pick one team, one well-understood workflow, and measure it for a month with the approval gate on. Scale what works. Switching everything on for everyone at once is how oversharing incidents happen.
What are Copilot Notebooks?
A Copilot Notebook is a workspace where you gather the files and notes for one piece of work, and Copilot grounds its answers in that set. The August update opens Notebooks to all users, and answers can now show images from your files and meetings inline. For new users it is a sensible, contained first step.
How should a business prepare for the new Copilot features?
Tidy Microsoft 365 permissions first so Copilot cannot surface over-shared files. Then decide which AI models and Cowork workflows are approved, agree where a person must sign off, and train staff on what not to paste or automate. Key IT does this groundwork before switching anything on.
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