ChatGPT Enterprise vs Microsoft 365 Copilot

Choose Microsoft 365 Copilot if your work lives in Outlook, Teams, Word and SharePoint: it answers from the mail, files and meetings each person can already see, and it is audited in Purview. Choose ChatGPT Enterprise if you want a standalone assistant on OpenAI's models with connectors to several workplace tools, not only Microsoft's.

Copilot is a per-user add-on to a Microsoft 365 plan at a published price. ChatGPT Enterprise is priced through OpenAI's sales team.

Last updated 9 November 2026. Facts about ChatGPT Enterprise and Microsoft 365 Copilot come only from their own public pages, listed under Sources.

ChatGPT Enterprise and Microsoft 365 Copilot side by side

ChatGPT Enterprise compared with Microsoft 365 Copilot
ChatGPT EnterpriseMicrosoft 365 Copilot
PriceThrough OpenAI's sales team, billed annuallyEnterprise $30 per user a month, paid yearly; needs a qualifying Microsoft 365 plan
GroundingConnectors to tools such as Google Workspace, Microsoft 365, Slack and GitHubMicrosoft Graph: email, chats, documents, calendar and meetings the user can view
ModelsOpenAI's modelsOpenAI models, plus Anthropic models as a subprocessor
Processing in EuropeData residency in Europe for new workspaces, and EU inference residencyEU Data Boundary; Anthropic models off by default in the EU, EFTA and UK and excluded from the EU Data Boundary
TrainingNo training on business data by defaultNot used to train foundation models
Single sign-onSAML SSO, SCIM and role-based accessMicrosoft Entra ID
AuditAudit logs through the Compliance APIMicrosoft Purview Audit records Copilot interactions, including the model provider
From each vendor's own pages, checked 9 November 2026.

Where they differ most

Where answers come from

Copilot works from Microsoft Graph, limited to what each user can view. ChatGPT connects to several workplace tools, Microsoft 365 among them.

Europe

Copilot runs within the EU Data Boundary, and Anthropic models are off by default in the EU, EFTA and UK. OpenAI offers European data and inference residency for new Enterprise workspaces.

Records

Copilot interactions are recorded in Microsoft Purview Audit next to your other Microsoft 365 records. ChatGPT Enterprise exposes audit logs through its Compliance API.

Choose ChatGPT Enterprise or Microsoft 365 Copilot

Choose ChatGPT Enterprise if

  • You want one assistant across Microsoft and non-Microsoft tools.
  • You want a workspace built on OpenAI's models and features.
  • You want data and inference residency in Europe from the vendor.

Choose Microsoft 365 Copilot if

  • Your company runs on Microsoft 365 and wants answers from its own mail, files and meetings.
  • You want AI records in Purview with the rest of your Microsoft 365 audit.
  • A published per-user price on your Microsoft agreement suits procurement.

A third option for companies

Both are seats for people in a chat. When the need is model access for agents, internal tools and developers, Standard Compute is one API for Claude, GPT, Gemini and open models, with a key and a fixed monthly budget for every person and app.

Cost per step

Each step goes to the cheapest model that can do it and the cheapest provider fast enough to serve it.

Models

Claude, GPT and Gemini alongside open models such as GLM, DeepSeek, MiniMax and Kimi, through one API.

Processing in Europe

A Europe rule per company, team or key: every request, including retries and fallbacks, is served only by approved European inference endpoints, or refused before your prompt is sent.

Zero data retention

Required per company, team or key, and Standard Compute never trains on your prompts or outputs.

Single sign-on

Microsoft Entra ID or any SAML provider, and Claude Desktop and Claude Code sign-in with a Microsoft work account.

Budgets

A fixed monthly budget per person and app that never overruns, and spending caps per key and for the whole company.

Allow-lists

Approved providers per company, team or key, and approved models per key. Fallbacks never route around them.

Audit log

Admin changes with before and after values, and a 12-month export of every request's model, provider and region rule.

Sign our Data Processing Agreement in the dashboard, and see every sub-processor with its purpose and location.

Create a company workspaceor write to contact@standardcompute.com

Questions

How much does Microsoft 365 Copilot cost?

Microsoft lists Microsoft 365 Copilot for enterprise at $30 per user a month, paid yearly, on top of a qualifying Microsoft 365 plan. Copilot Business has a lower published price.

Does Microsoft 365 Copilot use Claude?

Microsoft offers Anthropic models in Copilot with Anthropic as a subprocessor. They are off by default in the EU, EFTA and UK, and excluded from the EU Data Boundary.

Is ChatGPT Enterprise or Copilot used to train models?

OpenAI says it does not train on business data by default. Microsoft says prompts, responses and Microsoft Graph data are not used to train foundation models.

What if we need AI for apps and agents, not chat?

Standard Compute is one API for Claude, GPT, Gemini and open models, with Microsoft Entra sign-in, a Europe rule, zero data retention, budgets per key and for the company, allow-lists and an audit log.

Sources (checked 9 November 2026)

  1. ChatGPT Business pricingopenai.com
  2. ChatGPT plans and Codex pricinglearn.chatgpt.com
  3. OpenAI enterprise privacyopenai.com
  4. ChatGPT data residency and inference residencyhelp.openai.com
  5. Microsoft 365 Copilot for enterprisewww.microsoft.com
  6. Microsoft 365 Copilot Business pricingwww.microsoft.com
  7. Microsoft 365 Copilot privacylearn.microsoft.com
  8. Anthropic as a Copilot subprocessorlearn.microsoft.com
  9. Audit Copilot interactions in Purviewlearn.microsoft.com