Assistant
Copilot
Best for: Windows, Edge, Word, Excel, Outlook, Teams
Uses leading models (including OpenAI’s) plus Microsoft’s own.
App
🇺🇸 United States · USA
Microsoft (Copilot & Phi) models explained
Microsoft brings AI to Windows and Microsoft 365 through Copilot, builds its own compact Phi models, and offers many companies’ models to businesses through Azure.
All model families
Open-weight small models
Phi
Best for: Efficient on-device and edge AI
Small models that perform well for their size.
Open weightsAPI
Model platform
Azure AI Foundry catalogue
Best for: Businesses needing enterprise hosting
Access OpenAI, Mistral, Meta, DeepSeek and other models with Azure security and regional hosting.
API
Model names and versions change often. Check the official documentation for the newest releases.
⚡ Which model should you use?
- Office work: Copilot in Microsoft 365.
- Enterprise apps with EU/UK hosting: Azure AI Foundry.
- Small local models: Phi.
Data, privacy and your region
US providers offer business and enterprise plans with data-processing agreements, and some offer regional data residency (including in the EU/UK). Check the plan’s data-use and retention settings before sharing sensitive information. Azure offers EU and UK data-centre regions.
Frequently asked questions
Is Copilot the same as ChatGPT?
No. Copilot is Microsoft’s assistant; it uses models from OpenAI and others, integrated with Microsoft products and your work data.