check before: 2026-04-01
Product:
Copilot, Copilot Chat, Microsoft 365 Copilot
Platform:
Online, US Instances, Web, World tenant
Status:
Change type:
Admin impact, New feature, Updated message, User impact
Links:
Details:
Summary:
Anthropic Claude Sonnet is now available in Microsoft 365 Copilot Chat in Frontier and rolling out broadly by early April 2026. It offers users with a Copilot license a new AI model choice, except in EU/EFTA, UK, government, and sovereign clouds. Admins can opt in where off by default.
Details:
Updated April 7, 2026: We have updated the timeline. Thank you for your patience.
[Introduction]
We're expanding model choice in Microsoft 365 Copilot with the addition of Anthropic Claude Sonnet for users with a Microsoft 365 Copilot license. Claude Sonnet is available in Copilot Chat in Frontier, alongside the latest OpenAI models, giving users the flexibility to choose the model best suited for their tasks. This expansion reflects our commitment to delivering the latest AI innovation for work-while maintaining the security, compliance, and privacy standards customers expect from Microsoft.
[When this will happen:]
Frontier availability: Claude Sonnet is available now in Frontier.
General availability (web/desktop/macOS/mobile): Rolling out gradually; expected completion early April 2026 (previously late March).
Change Category:
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Scope:
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Release Phase:
Created:
2026-03-17
updated:
2026-04-08
Task Type
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Docu to Check
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MS How does it affect me
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MS Preperations
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MS Urgency
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MS workload name
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Pictures
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summary for non-techies**
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Direct effects for Operations**
Model Availability
Users in the EU/EFTA and UK will not have access to the new AI model, Claude Sonnet, which may limit their capabilities compared to users in other regions.
- roles: End Users, IT Administrators
- references: https://learn.microsoft.com/en-us/copilot/microsoft-365/connect-to-ai-subprocessor
User Experience
The introduction of a new AI model without proper communication may lead to confusion among users regarding which model to use for their tasks, potentially impacting productivity.
- roles: End Users, Support Staff
- references: https://learn.microsoft.com/en-us/copilot/microsoft-365/connect-to-ai-subprocessor
Admin Configuration
Admins may face challenges in managing the new model settings if they are not adequately prepared, leading to potential security and compliance issues.
- roles: IT Administrators, Compliance Officers
- references: https://learn.microsoft.com/en-us/copilot/microsoft-365/connect-to-ai-subprocessor
Configutation Options**
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Opportunities**
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Potentional Risks**
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Data Protection**
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IT Security**
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Hypothetical Work Council Statement**
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DPIA Draft**
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explanation for non-techies**
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** AI generated content. This information must be reviewed before use.
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change history
| Date | Property | old | new |
| 2026-04-08 | MC Messages | [Introduction]
We're expanding model choice in Microsoft 365 Copilot with the addition of Anthropic Claude Sonnet for users with a Microsoft 365 Copilot license. Claude Sonnet is available in Copilot Chat in Frontier, alongside the latest OpenAI models, giving users the flexibility to choose the model best suited for their tasks. This expansion reflects our commitment to delivering the latest AI innovation for work-while maintaining the security, compliance, and privacy standards customers expect from Microsoft. [When this will happen:] Frontier availability: Claude Sonnet is available now in Frontier. General availability (web/desktop/macOS/mobile): Rolling out gradually; expected completion late March 2026. | Updated April 7, 2026: We have updated the timeline. Thank you for your patience.
[Introduction] We're expanding model choice in Microsoft 365 Copilot with the addition of Anthropic Claude Sonnet for users with a Microsoft 365 Copilot license. Claude Sonnet is available in Copilot Chat in Frontier, alongside the latest OpenAI models, giving users the flexibility to choose the model best suited for their tasks. This expansion reflects our commitment to delivering the latest AI innovation for work-while maintaining the security, compliance, and privacy standards customers expect from Microsoft. [When this will happen:] Frontier availability: Claude Sonnet is available now in Frontier. General availability (web/desktop/macOS/mobile): Rolling out gradually; expected completion early April 2026 (previously late March). |
| 2026-04-08 | MC Title | Anthropic Claude Sonnet is now available in Microsoft 365 Copilot | (Updated) Anthropic Claude Sonnet is now available in Microsoft 365 Copilot |
| 2026-04-08 | MC Last Updated | 03/09/2026 23:17:56 | 2026-04-08T00:03:19Z |
| 2026-04-08 | MC MessageTagNames | New feature, User impact, Admin impact | Updated message, New feature, User impact, Admin impact |
| 2026-04-08 | MC Summary | Anthropic Claude Sonnet is now available in Microsoft 365 Copilot for licensed users, except in EU/EFTA, UK, government, and sovereign clouds. It can be selected in Copilot Chat, with rollout completing by late March 2026. Admins may need to opt in where Anthropic is off by default. | Anthropic Claude Sonnet is now available in Microsoft 365 Copilot Chat in Frontier and rolling out broadly by early April 2026. It offers users with a Copilot license a new AI model choice, except in EU/EFTA, UK, government, and sovereign clouds. Admins can opt in where off by default. |
Last updated 13 hours ago ago
