ChatGPT Enterprise vs Microsoft 365 Copilot Business
Contact sales vs $21/seat/mo billed annually: choose by included models and usage limits. API usage is separate.
| Compare | ChatGPT Enterprise | Microsoft 365 Copilot Business |
|---|---|---|
| Monthly USD | Contact sales | $21/seat/mo billed annually |
| Included models | Codex | Microsoft 365 Copilot |
| Billing | contract | annual-or-month-to-month |
| Verified · Monthly USD source · Included models source · How we verify → | ||
· Updated 2026-11-02
Which one should you pick?
Pick ChatGPT Enterprise if you want
- Codex as your main model
- coding agent
Pick Microsoft 365 Copilot Business if you want
- Microsoft 365 Copilot as your main model
- deep research
- office & app integrations
Based on listed plan terms; check usage limits before upgrading.
| Attribute | ChatGPT Enterprise | Microsoft 365 Copilot Business |
|---|---|---|
| Price | Contact sales | $21/seat/mo billed annually |
| Best for | Companies needing compliance | Adding Copilot to M365 Business |
| Usage | Set by contract | Everyday chat included |
| Billing | contract | annual-or-month-to-month |
| Audience | enterprise | business |
| Models | Codex | Microsoft 365 Copilot |
| Key perks | Contract pricing; Compliance API; 24/7 support with SLAs | Add-on only; $18 promo to Dec 2026; Researcher & Analyst |
| Context window | Not fixed per plan | Not fixed per plan |
| Deep research | Not listed | Yes |
| Coding agent | Yes | Not listed |
| Office & app integrations | Not listed | Yes |
| Team admin & SSO | Yes | Yes |
| Verified | Price 2026-11-02 · models 2026-11-02 | Price 2026-11-12 · models 2026-11-12 |
✓ listed in the provider's current plan terms · — not listed (may still be available) · Pricing data: How we verify →
Usage limits in full
- ChatGPT Enterprise
- Contact sales for a contracted quote and usage terms. ChatGPT Work and Codex are named products; the Enterprise page does not enumerate individual model SKUs. Availability, retention and administrative controls depend on the agreement.
- Microsoft 365 Copilot Business
- Add-on only: requires an existing eligible Microsoft 365 Business subscription. $21/user/month with annual commitment ($252/user/year); month-to-month $25.2/user/month. $18.00/user/month first-year annual promotion runs 2026-07-01 through 2026-12-31, excludes trials and cannot be combined with other offers. Subscriptions auto-renew. Everyday chat and Copilot in apps are included; advanced experiences including Cowork, Code, Autopilot and Work IQ APIs are usage-billed beyond license fees. Teams license required for Teams features. No specific API model SKU or numerical usage quota is promised.
Everything each plan lists
Only in ChatGPT Enterprise
- +ChatGPT Work
- +Codex
- +centralized access and governance controls
- +encryption and retention controls
- +Compliance API visibility
- +24/7 support with SLAs
- +no training on business data by default
Only in Microsoft 365 Copilot Business
- +Copilot in Microsoft 365 apps
- +work data grounding
- +model choice
- +Researcher and Analyst
- +enterprise data protection
- +management and analytics
- +eligible Microsoft 365 Business subscription required
How to decide
Picking between ChatGPT Enterprise and Microsoft 365 Copilot Business usually comes down to three things: which models you want access to, how much you'll actually use, and what ecosystem you already live in. Still unsure? The Subscription vs API calculator tells you the break-even usage where pay-as-you-go API access would be cheaper than either subscription.
Frequently asked questions
What is the price difference between ChatGPT Enterprise and Microsoft 365 Copilot Business?
ChatGPT Enterprise is priced at Contact sales and Microsoft 365 Copilot Business at $21/seat/mo billed annually. Pricing structures differ, so compare the table above for a like-for-like view.
Which AI models are included with ChatGPT Enterprise vs Microsoft 365 Copilot Business?
ChatGPT Enterprise bundles Codex. Microsoft 365 Copilot Business bundles Microsoft 365 Copilot. The model lineup is usually the most important factor — pick the plan whose flagship models match the work you actually do.
Is ChatGPT Enterprise or Microsoft 365 Copilot Business better value for power users?
It depends on usage. Use the Subscription vs API calculator to see at what monthly usage level either plan beats pay-as-you-go API access.
Can I switch between ChatGPT Enterprise and Microsoft 365 Copilot Business?
Check each provider's billing terms before switching. Monthly, annual and per-seat commitments can differ; cancellation usually stops renewal rather than refunding the current period.