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Microsoft Copilot Studio supports multiple generative AI models with different capabilities, performance characteristics, and availability requirements. You can select a model for an agent that uses the GitHub Copilot harness. You can also explore experimental and preview models before they become generally available.
This article explains model release types, currently listed models, retirement dates, regional availability, and administrator controls. Model availability can vary by region, environment settings, and release stage.
Model release types and availability labels
Release types describe production readiness. Lifecycle and availability labels describe a model's status or conditions for use.
Release type
| Release type | Description |
|---|---|
| Experimental | Used for experimentation, and not intended for production use. Subject to preview terms and limitations on availability and quality. |
| Preview | Might eventually become a generally available model, but currently not intended for production use. Subject to preview terms and limitations on availability and quality. |
| Generally available (GA) | Models without a release tag are generally available. You can use these models for scaled and production use. In most cases, generally available models have no limitations on availability and quality, but some might still have some limitations, like regional availability. |
Other label
| Other label | Meaning |
|---|---|
| Default | The default model for all agents, and usually the best-performing generally available model. The default model is periodically upgraded as new, more capable models become generally available. Agents also use the default model as a fallback if a selected model is turned off or unavailable. |
| Retiring soon | Scheduled for retirement. Check the retirement date and designated replacement. |
| Retired | Has reached its retirement date. Existing-agent behavior and any exceptions depend on the applicable retirement policy. |
| Cross-geo | Might involve processing or storage outside the organization's geographic boundary. |
| Early access environment | Only available in early release cycle environments. These environments receive new updates and features first. Learn more in Early release cycle environments. |
Model lifecycle summary
The Available models table shows the most recent model changes. The Retirement table identifies models with announced lifecycle changes. For geographic restrictions, see Model availability by region.
Available models
| Model | Release type | Lifecycle note |
|---|---|---|
| GPT-5 Chat | GA | Retiring November 12, 2026 |
| GPT-5.6 Sol | GA | Retiring November 12, 2026 |
| GPT-5.6 Luna | GA | Retiring November 12, 2026 |
| GPT-5.6 Terra | GA | |
| GPT-6 Astra | GA | |
| GPT-6 Sol | GA | |
| GPT-6.1 Sol | GA | |
| GPT-6.1 Terra | GA | |
| GPT-6 Luna | GA | |
| Claude Sonnet 4.6 | GA | |
| Claude Sonnet 5 | GA | |
| Claude Haiku 5.5 | GA | |
| Claude Sonnet 5.5 | GA | |
| Claude Fable 5 | GA | |
| Claude Fable 5.1 | GA | |
| Claude Opus 4.8 | GA | |
| Claude Opus 5 | GA | |
| Claude Opus 5.5 | GA | |
| Grok 4.6 | GA | |
| Mistral Medium 3.5 | Experimental | Available only in early-access Europe environments. |
Model retirement lifecycle
The following models are retiring soon or have retired. Review the listed replacement and any applicable exceptions. A replacement designation doesn't by itself establish whether migration is automatic.
| Model | Lifecycle status | Date | Replacement model |
|---|---|---|---|
| GPT-5 Chat | Retiring soon | November 12, 2026 | GPT-6 Luna |
| GPT-5 Chat (EU/EFTA, data movement across regions turned off) | Retiring soon | November 30, 2026 | GPT-6 Luna |
| GPT-5.6 Sol | Retiring soon | November 12, 2026 | GPT-6.1 Sol |
| GPT-5.6 Luna | Retiring soon | November 12, 2026 | GPT-6 Luna |
| GPT-5.5 Chat | Retired | October 31, 2026 | GPT-6 Luna |
Important
GPT-5 Chat retires on November 12, 2026, with the following exceptions:
- EU/EFTA environments with data movement across regions turned off: GPT-5 Chat remains available until November 30, 2026. This exception doesn't apply to environments in the United Kingdom, where GPT-5 Chat availability isn't affected by this specific restriction. Because of EU AI Act requirements, access can't be extended beyond this date. We recommend that you test your agents with GPT-6 Luna before November 30, 2026.
- FedRAMP environments: GPT-5 Chat remains available until further notice.
To check your data movement setting, see Move data across regions for Copilots, AI agents, and generative AI features.
Model availability by region
The following table shows availability status across regions and special scopes. Availability is listed as available by default. A — means the model is explicitly unavailable in that region based on model-definition rules.
| Model | Asia | Australia | Brazil | Canada | Europe (Except UK) | India | Japan | Korea | Saudi Arabia | Singapore | South Africa | United Kingdom | United States |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GPT-5 Chat | GA (cross-geo) | GA | GA (cross-geo) | GA (cross-geo) | GA | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA | GA |
| GPT-5.6 Sol | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) |
| GPT-5.6 Luna | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) |
| GPT 5.6 Terra | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) |
| GPT-6 Astra | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA |
| GPT 6 Sol | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) |
| GPT-6.1 Sol | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) |
| GPT 6.1 Terra | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) |
| GPT-6 Luna | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) |
| Claude Sonnet 4.6 | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA |
| Claude Sonnet 5 | GA (cross-geo) | — | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | — | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (early access environment) |
| Claude Haiku 5.5 | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) |
| Claude Sonnet 5.5 | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) |
| Claude Fable 5 | GA (cross-geo) | — | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | — | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (early access environment) |
| Claude Fable 5.1 | GA (cross-geo) | — | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | — | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (early access environment) |
| Claude Opus 4.8 | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA |
| Claude Opus 5 | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA |
| Claude Opus 5.5 | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) |
| Grok 4.6 | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | — | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | GA (cross-geo) | — | GA (cross-geo) |
Important
Cross-geo behavior applies to this availability table. A model can be listed as available in a region even when processing is routed outside that region. If your environment doesn't permit cross-geo data movement, that model might be unavailable at runtime. Administrators can block makers from adding preview and experimental AI models to agents.
Model use categories
The Auto category supports mixed workloads by routing requests dynamically, including knowledge and action scenarios. Latency, cost, and reasoning effort might vary by request.
External models
Copilot Studio also supports external model offerings, including Anthropic and Mistral models. Availability and requirements depend on the model and applicable terms.
- Anthropic: Anthropic is a Microsoft subprocessor that operates with Microsoft oversight through contractual safeguards and appropriate technical and organizational measures. Learn more about subprocessors.
- Mistral: Mistral models are hosted outside Microsoft and are subject to Mistral terms and data handling. Admins need to review and accept these terms before makers can use the models. Learn more about using Mistral models. These models are available before an official release so that you can get early access and provide feedback.
Important
Don't use external models labeled Experimental or Preview for production workloads. Such models might be subject to limited capacity, slowdowns, timeouts, or future availability changes.
Limitations of experimental and preview models
Experimental and preview models are intended for evaluation and testing, not production use. They might vary in response quality, latency, performance, and message consumption. They might time out or become unavailable. These models are subject to preview terms.
If you publish an agent that uses an experimental or preview model, usage is billed at the applicable established rates. Review current billing guidance before publication.
Admin controls for AI model selection
Administrators can use the following settings to allow or block makers from adding preview and experimental AI models to agents:
- Administrators can choose to allow or block preview and experimental models in an environment. To use these models, turn on the Preview and experimental AI models setting for your environment.
- Data processed within a preview or experimental model might be processed and stored outside of your organization's geographical boundaries. To make experimental models available, your environment must have the Move data across regions setting turned on. The tenant administrator manages this environment-level setting in the Power Platform admin center.
For models marked cross-geo, administrators should review data movement requirements and the organization's geographic restrictions before enabling access.
Admin controls and requirements for external models
Admins control whether makers can add external models to agents. To grant access to external models, admins must complete the following actions:
Turn on external models in Power Platform admin center for the environment or the environment group.
Allow access to each external model provider in the Microsoft 365 admin center. Learn more in the Microsoft 365 admin center documentation:
Preview models and external models are two different sets that can overlap but aren't the same, and their settings are separate. For example:
Admins can block external models but allow preview or experimental models. In this case, makers can't use external models but can use preview, experimental, and generally available internal models.
Admins can block preview or experimental models but allow external models. In this case, makers can't use any preview or experimental models, but can use any generally available external and internal models.
External models might require extra administrator approval and acceptance of provider terms. For guidance on the specific provider and model, review the current external-model guidance.