*For this entry exists the more relevant or more recent entry MC1192003
check before: 2025-11-01
Product:
Copilot, Microsoft 365 Apps, Microsoft 365 Copilot, Teams
Platform:
Online, Web, World tenant
Status:
Change type:
New feature, Updated message, User impact
Links:
Details:
Summary:
GPT-5 will become the default Microsoft 365 Copilot model in a phased rollout from early to late November 2025. Initially, users can toggle GPT-5 on or off; later, it becomes mandatory with no opt-out. GPT-5 offers faster, more accurate responses with dynamic model routing and deeper reasoning.
Details:
Updated October 30, 2025: We have updated the timeline. Thank you for your patience.
[Introduction]
We're updating the default experience for users with the Microsoft 365 Copilot license by introducing GPT-5 as the standard model. GPT-5 is OpenAI's most advanced language model, designed to deliver faster, more accurate, and more context-aware responses. It features dynamic model routing, which automatically selects the best-performing variant for each prompt-using high-throughput models for quick replies and deeper reasoning models for complex tasks. This change simplifies the user experience and enhances performance across all Copilot endpoints.
[When this will happen:]
General Availability (Worldwide): Phased rollout begins early November 2025 (previously late October) and completes by late November 2025.
Change Category:
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Scope:
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Release Phase:
Created:
2025-10-21
updated:
2025-10-30
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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Pictures
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summary for non-techies**
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Direct effects for Operations**
Please, look at the most relevant linked item for details
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 |
| 2025-10-30 | MC Messages | [Introduction]
We're updating the default experience for users with the Microsoft 365 Copilot license by introducing GPT-5 as the standard model. GPT-5 is OpenAI's most advanced language model, designed to deliver faster, more accurate, and more context-aware responses. It features dynamic model routing, which automatically selects the best-performing variant for each prompt-using high-throughput models for quick replies and deeper reasoning models for complex tasks. This change simplifies the user experience and enhances performance across all Copilot endpoints. [When this will happen:] General Availability (Worldwide): Phased rollout begins late October 2025 and completes by late November 2025. | Updated October 30, 2025: We have updated the timeline. Thank you for your patience.
[Introduction] We're updating the default experience for users with the Microsoft 365 Copilot license by introducing GPT-5 as the standard model. GPT-5 is OpenAI's most advanced language model, designed to deliver faster, more accurate, and more context-aware responses. It features dynamic model routing, which automatically selects the best-performing variant for each prompt-using high-throughput models for quick replies and deeper reasoning models for complex tasks. This change simplifies the user experience and enhances performance across all Copilot endpoints. [When this will happen:] General Availability (Worldwide): Phased rollout begins early November 2025 (previously late October) and completes by late November 2025. |
| 2025-10-30 | MC Title | GPT-5 becomes the default Copilot model | (Updated) GPT-5 becomes the default Copilot model |
| 2025-10-30 | MC Last Updated | 10/21/2025 01:47:40 | 2025-10-30T20:35:10Z |
| 2025-10-30 | MC MessageTagNames | New feature, User impact | Updated message, New feature, User impact |
| 2025-10-30 | MC Summary | GPT-5 will become the default Microsoft 365 Copilot model in a phased rollout from October to November 2025. Initially, users can toggle GPT-5 on or off; later, it becomes mandatory with no opt-out. GPT-5 offers faster, more accurate responses with dynamic model routing and reasoning features. | GPT-5 will become the default Microsoft 365 Copilot model in a phased rollout from early to late November 2025. Initially, users can toggle GPT-5 on or off; later, it becomes mandatory with no opt-out. GPT-5 offers faster, more accurate responses with dynamic model routing and deeper reasoning. |
Last updated 4 weeks ago ago
