Microsoft 365 Copilot now gives you two very different ways to work with AI, and knowing which one to reach for is the difference between getting a fast answer and getting an entire deliverable done.
Copilot Chat is the conversational AI you already know: ask a question, get a draft, spark an idea. Copilot Cowork, generally available since June 2026, is the new agentic layer that takes action across your apps and completes multi-step work on your behalf.
They’re not competitors. They’re built for different shapes of work. Here’s how to tell them apart and choose the right one every time.
The core difference, in one line: Copilot Chat helps you think through your work. Copilot Cowork does the work.
Chat is a conversation: fast, single-session, and focused on generating content or insight that you then act on. Cowork is a delegation: you hand off an outcome, and it plans the steps, takes the actions across Microsoft 365, and delivers the finished result while you stay in control.
Side-by-side comparison
| Copilot Chat | Copilot Cowork | |
|---|---|---|
| What it is | Always-on AI for drafting, summarizing, and answering questions in a single conversation | Agentic AI that plans and completes multi-step work across Microsoft 365, grounded in your work context through Work IQ. |
| Best for | Fast, focused, single-task help | End-to-end work spanning multiple steps and data sources. |
| Speed | Seconds to minutes | Minutes to hours (autonomous execution) |
| Task complexity | Single-step or single-session | Multi-step workflows across tasks, apps, and sources |
| How you work with it | You chat back and forth and act on the output | You describe an outcome, approve key actions, and review the deliverable |
| Use it when… | You need a quick draft, answer, or idea | You need Copilot to take action across apps, files, or systems |
| Example scenarios | Quick catch-up, project-status summary, brainstorming, drafting content | Inbox + calendar clean-up, meeting/business-review prep, project launches, multi-artifact deliverables |
When to use Copilot Chat
Reach for Chat when the work fits inside a single conversation and you just need momentum:
- Draft or refine content from a prompt
- Summarize a document, meeting, or email thread
- Brainstorm ideas or explore a topic
- Get a quick answer grounded in your work data
- Pull an on-demand briefing or a fast project-status recap
Chat is the entry point: the fastest path to “help me with this one thing right now.”
When to use Copilot Cowork
Reach for Cowork when you’d otherwise block off time to grind through a process yourself:
- Clean up your entire inbox and calendar in one pass
- Prepare for a meeting or business review by assembling emails, calendar items, data, and files into a briefing
- Produce multiple artifacts at once – a Word summary, an Excel model, and a PowerPoint deck from one request
- Run a full research → report → action workflow end to end
- Automate recurring work with prompts that run on a schedule
The mental-model shift is in the prompt itself. Chat says ”send a message.” Cowork says ”start a task.” With Cowork, you describe the outcome (“Prep me for tomorrow’s quarterly review”) rather than the steps, and let it figure out how to get there, pausing for your approval before it sends, posts, or schedules anything.
How pricing differs (and why it matters)
This is the most practical reason to choose deliberately.
- Copilot Chat is part of the Microsoft 365 Copilot experience – the conversational interface included with the per-user subscription. Using it doesn’t add incremental, work-based charges.
- Copilot Cowork requires a Microsoft 365 Copilot license as its prerequisite, then bills on usage through Copilot Credits – pay-as-you-go at $0.01 per credit, or via discounted annual pre-purchase. Because Cowork runs longer, more compute-intensive work, cost scales with the size and complexity of each task (Microsoft’s illustrative ranges run from ~70 credits for a light task to ~1,500 for a heavy one).
The takeaway for your teams: use the lightest tool that does the job. If a quick Chat prompt answers the question, use Chat. Save Cowork for the multi-step processes where its autonomous, end-to-end execution earns its keep, and where the time it gives back clearly outweighs the per-task cost.
A simple decision rule
- One question, one draft, one idea → Copilot Chat
- One process, multiple steps, a finished deliverable → Copilot Cowork
Get that habit right across your organization and you capture the best of both: the speed of conversational AI for everyday moments, and the leverage of agentic AI for the work that used to eat your afternoon.
