Anthropic’s Claude models are now generally available in Microsoft Foundry, with the service hosted on Azure. Organisations can run Claude within their Azure environment using existing Microsoft authentication, billing, and governance controls.
The rollout adds Claude to Microsoft Foundry’s broader model catalogue.
According to NVIDIA, Claude models in Microsoft Foundry are hosted on Azure infrastructure running NVIDIA GB300 Blackwell Ultra GPUs. The deployment uses NVIDIA GB300 NVL72 systems and NVIDIA Quantum-X800 InfiniBand networking.
The launch includes Claude Opus 4.8 and Claude Haiku 4.5 through the Messages API. The models support prompt caching, extended thinking, and tool streaming.
Claude in Microsoft Foundry works with Azure identity, networking, and governance systems. Customers can authenticate with Microsoft Entra ID, apply Azure role-based access controls, and manage access through existing governance policies.
Customers receive billing through Azure, while eligible organisations with a Microsoft Enterprise Agreement can apply Claude usage against their Azure commitment. Claude usage is billed through Claude Consumption Units, with charges appearing on the customer’s Azure bill.
Microsoft said MACC drawdown and per-model usage detail in Foundry remain unchanged.
Customers can choose between Global and US data zones for inference processing, including workloads with data residency requirements.
In the Azure-hosted option, Azure infrastructure processes prompts and outputs, including request ingress, API services, and GPU inference. In the Anthropic-hosted option, Anthropic infrastructure processes prompts and outputs, and data may be processed outside Azure.
Microsoft’s documentation says Anthropic remains the seller and operator of Claude models in Microsoft Foundry and acts as an independent data processor for prompts and outputs.
Microsoft said zero data retention is available for high-sensitivity workloads. This means prompts and completions are not retained by Anthropic after the API call is completed.
Microsoft said Foundry Agent Service can use Claude as the reasoning core for multi-step planning, tool use, and task execution across enterprise systems.
Microsoft also said Foundry includes a model router that can direct queries to the most appropriate Claude model. The company said the feature can reduce costs by up to 50%.
NVIDIA said enterprises can use its Secure Agent Workspace Reference Design to run Claude agents on Azure in governed environments. The reference design covers infrastructure-level controls for identity, network access, credentials, and runtime policy.
Microsoft Foundry offers two Claude hosting options. The Azure-hosted route runs processing on Azure infrastructure with Microsoft authentication, billing, governance, and data zone controls.
The Anthropic-hosted route, previously available through the Foundry Preview, remains available for Anthropic API features or Claude models not yet supported in the Azure-hosted service. Anthropic said it aims to bring feature and model parity between the Azure-hosted and Anthropic-hosted options over time.
Momentic said it uses Claude Opus models through Microsoft Foundry to support software testing workflows and now serves millions of tokens per minute. The company said its customers describe tests in plain English, while Momentic runs through the interface to verify software before release.
Everstar said it used Anthropic and Azure for nuclear safety analysis work, according to Microsoft’s announcement.
The Azure deployment follows a November partnership between Microsoft, NVIDIA, and Anthropic covering Claude availability on NVIDIA accelerated computing. Reuters reported that Microsoft and NVIDIA planned to invest up to US$15 billion in Anthropic under the partnership, while Anthropic committed to buy US$30 billion in Azure compute capacity.
Anthropic said it plans to expand Claude’s availability in Microsoft Foundry over time.
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