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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 Claude models including Claude Fable 5.1, Claude Opus 5.5, Claude Opus 5, Claude Opus 4.8, Claude Sonnet 5.5, Claude Sonnet 5, and Claude Haiku 5.5, 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 5.5, Claude Opus 5, Claude Opus 4.8, Claude Sonnet 5.5, Claude Sonnet 5, and Claude Haiku 5.5, and features such as the [1M-token context window](https://platform.claude.com/docs/en/build-with-claude/context-windows). You manage 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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620620### Context window
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622Claude Fable 5.1, Claude Fable 5, Claude Opus 5.5, Claude Opus 5, Claude Opus 4.8, Claude Opus 4.7, Claude Opus 4.6, Claude Sonnet 5.5, Claude Sonnet 5, Claude Sonnet 4.6, and Claude Haiku 5.5 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 (deprecated), have a 200k-token context window.
622Claude Fable 5.1, Claude Mythos 5.1, Claude Fable 5, Claude Mythos 5, Claude Opus 5.5, Claude Opus 5, Claude Opus 4.8, Claude Opus 4.7, Claude Opus 4.6, Claude Sonnet 5.5, Claude Sonnet 5, Claude Sonnet 4.6, and Claude Haiku 5.5 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 (deprecated), have a 200k-token context window.
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624624### Claude features not supported for Claude in Microsoft Foundry
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