Claude In Microsoft Foundry

Anthropic's November 18, 2025 announcement with Microsoft said Claude Sonnet 4.5, Haiku 4.5 and Opus 4.1 were available in public preview in Microsoft Foundry, where Azure customers build applications and agents, giving them a way to adopt Claude through existing cloud agreements and billing. Claude is served serverlessly, with Anthropic managing the infrastructure. Foundry announcement.

Anthropic said Claude usage was eligible for the Microsoft Azure Consumption Commitment, the arrangement under which qualifying spending counts toward an organization's existing Azure commitment, so no separate vendor approval was needed. Developers could also sign in with Microsoft Entra authentication. These details explain the integration's procurement value: access to another model family could fit into an established purchasing and identity system. This describes the preview as announced in 2025, not current availability. Agreement and access details.