Microsoft is today announcing a strategic partnership with Anthropic that will bring the AI startup model to Microsoft Foundry for the first time. As part of the deal, Anthropic also committed to purchasing $30 billion of Azure compute capacity and “contracting up to one gigawatt of additional compute capacity.”
Microsoft Foundry customers will now have access to Anthropic’s leading cloud models, including Cloud Sonnet 4.5, Cloud Opus 4.1, and Cloud Haiku 4.5. Despite these models coming to Microsoft’s AI servers, Amazon will still remain Anthropic’s primary cloud provider and training partner.
Nvidia and Anthropic are also partnering as part of the deal today, to optimize Anthropic’s models for best performance on future Nvidia architectures. Anthropic is committed to up to one gigawatt of compute capacity using Nvidia Blackwell and Vera Rubin systems.
As part of these partnerships, Nvidia is investing up to $10 billion in Anthropic, with Microsoft also investing $5 billion.
Microsoft is increasingly adopting Anthropic’s models into its Copilot services. In fact, Microsoft is preferring Anthropic’s Cloud 4 over GPT-5 in its new Auto AI model selector in Visual Studio Code. Microsoft has also brought Anthropic’s Cloud Sonnet 4 and Cloud Opus 4.1 to Microsoft 365 CoPilot users.