ChatGPT vs Microsoft Copilot: which personal assistant should you choose?
Answer in brief: Choose ChatGPT for a standalone assistant that handles everything, with scheduled tasks, agent mode and the always-on dot agent on Pro. Choose Microsoft Copilot if your email, calendar and documents already live in Outlook and Office. Microsoft 365 plans put Copilot inside Word, Excel, PowerPoint, Outlook, OneNote and Teams, and bundle the desktop apps, OneDrive storage and Microsoft Defender. Microsoft 365 Personal costs $9.99/month or $99.99/year, so it can be the better value if you would pay for Office anyway. This is independent research from vendor pages, checked November 9, 2026. We did not test hands-on.
Top pick: ChatGPT, the most capable all-round assistant on our ranked list.
Best value for Office users: Microsoft Copilot. AI, Office apps, 1 TB or more of storage and Defender in one plan.
Standalone brain vs built-in coworker
| Feature | ChatGPT | Microsoft Copilot (Microsoft 365) |
|---|---|---|
| Free option | Yes | Yes, limited usage with a free Microsoft account |
| Entry paid plan (US) | Go, $8/month | Personal, $9.99/month or $99.99/year (1 person, 1 TB) |
| Mid tier | Plus, $20/month | Premium, $19.99/month or $199.99/year (extensive usage, agentic AI for research and analytics) |
| Top tier | Pro $100 to $500/month | Pro, $99.99/month (highest usage, 5 TB shared) |
| Office apps included | No | Word, Excel, PowerPoint, Outlook, OneNote, Teams |
| Sharing | Individual plans | Family, Premium and Pro cover up to 6 people, but AI is for the subscription owner only |
| Background or agent work | Scheduled tasks on all plans; agent mode on Plus and Pro; dot on Pro | Agentic features on Premium and Pro |
| Usage disclosure | Plan-based limits | Relative terms only: 'higher than free', 'extensive', 'highest' |
Pick ChatGPT if you want the assistant to lead
- Tasks that run without you. Scheduled tasks on every plan, plus event-triggered tasks on Plus and Pro.
- Delegation beyond documents. Agent mode on Plus and Pro, and an always-on dot with persistent context on Pro, which is rolling out gradually and not offered in the EEA, Switzerland or the UK.
- Low-cost start. Go costs $8/month.
Pick Copilot if Office is already your home base
- AI inside the file. Draft and summarize emails in Outlook, analyze data in Excel and build outlines in PowerPoint. Note that Copilot in Excel needs AutoSave and OneDrive.
- Everything bundled. Desktop Office apps, 1 TB (Personal), 2 TB (Family and Premium) or 5 TB (Pro) of OneDrive, and Microsoft Defender security.
- Your work files too. Microsoft says you can use Copilot in select apps with work files, provided your employer's enterprise subscription allows multi-account access.
Pricing model
ChatGPT sells AI-only subscriptions: Free, Go $8, Plus $20 and Pro $100, $200 or $500 per month. Microsoft sells productivity suites with Copilot inside: Personal $99.99/year, Family $129.99/year, Premium $199.99/year (or $9.99, $12.99 and $19.99 monthly) and Pro $99.99/month. Paying yearly saves up to 17%, and Microsoft offers a one-month free trial on Personal, Family and Premium.
FAQ
Can my family share Copilot on Microsoft 365 Family?
Family members share the apps and storage, but Microsoft states that the AI features are available only to the subscription owner and cannot be shared.
Is Copilot free?
There is a free version with limited usage on a free Microsoft account. Higher usage and Copilot inside the desktop Office apps need a paid Microsoft 365 plan.
Which is better for email?
If you use Outlook, Copilot drafts and summarizes inside it. If you don't, ChatGPT is the more flexible general assistant.
Keep comparing
See our ChatGPT review and Microsoft Copilot review, read alternatives to ChatGPT, or go back to the ranked list of the best AI personal assistants.
Sources
- Microsoft: Compare Microsoft 365 plans
- Microsoft: Microsoft 365 Pro
- OpenAI: Pro tiers
- OpenAI: Scheduled tasks
- OpenAI: ChatGPT agent
- OpenAI: ChatGPT Go
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