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44description: Access Claude models through Microsoft Foundry with Azure-native endpoints and authentication.
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7This guide shows you how to set up and make API calls to Claude in Microsoft Foundry using one of Anthropic's client SDKs or direct HTTP requests. When you access Claude in Microsoft Foundry, you are billed for Claude usage in the Azure Marketplace. You can use the latest Claude models, including Claude Opus 5, Claude Opus 4.8, and Claude Sonnet 5, and features such as the [1M-token context window](https://platform.claude.com/docs/en/build-with-claude/context-windows), while managing costs through your Azure subscription.
7This guide shows you how to set up and make API calls to Claude in Microsoft Foundry using one of Anthropic's client SDKs or direct HTTP requests. When you access Claude in Microsoft Foundry, you are billed for Claude usage in the Azure Marketplace. You can use Claude models including Claude Fable 5.1, Claude Opus 5, Claude Opus 4.8, and Claude Sonnet 5, and features such as the [1M-token context window](https://platform.claude.com/docs/en/build-with-claude/context-windows), while managing costs through your Azure subscription.
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99Claude is available in Global Standard and US Data Zone Standard deployment types in Foundry resources, billed in Claude Consumption Units through the Azure Marketplace. Visit [Claude in Microsoft Foundry pricing](https://platform.claude.com/docs/en/about-claude/pricing#claude-in-microsoft-foundry-pricing) for details.
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633633### Context window
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635Claude Fable 5, Claude Opus 5, Claude Opus 4.8, Claude Opus 4.7, Claude Opus 4.6, Claude Sonnet 5, and Claude Sonnet 4.6 have a [1M-token context window](https://platform.claude.com/docs/en/build-with-claude/context-windows) on Microsoft Foundry. Other Claude models, including Claude Sonnet 4.5, have a 200k-token context window.
635Claude Fable 5.1, Claude Fable 5, Claude Opus 5, Claude Opus 4.8, Claude Opus 4.7, Claude Opus 4.6, Claude Sonnet 5, and Claude Sonnet 4.6 have a [1M-token context window](https://platform.claude.com/docs/en/build-with-claude/context-windows) on Microsoft Foundry. Other Claude models, including Claude Sonnet 4.5, have a 200k-token context window.
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637637### Claude features not supported for Claude in Microsoft Foundry
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672672| Model | Default deployment name | Hosted on Azure | Hosted on Anthropic |
673673| ----------------- | ----------------------- | --------------- | ------------------- |
674| Claude Fable 5.1 | claude-fable-5-1 | | ✓ |
674675| Claude Fable 5 | claude-fable-5 | | ✓ |
675676| Claude Opus 5 | claude-opus-5 | ✓ | ✓ |
676677| Claude Opus 4.8 | claude-opus-4-8 | ✓ | ✓ |