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Microsoft is announcing a strategic partnership with Anthropic today that will bring the AI startup’s models to Microsoft Foundry for the first time. like Part of the dealAnthropic is also committed to purchasing $30 billion of Azure compute capacity and “contracting for up to one gigawatt of additional compute capacity.”
Microsoft Foundry customers will now have access to Anthropic’s Claude frontier models, including Claude Sonnet 4.5, Claude Opus 4.1, and Claude Haiku 4.5. Although these models will arrive on Microsoft’s AI servers, Amazon will remain Anthropic’s primary cloud provider and training partner.
Nvidia and Anthropic are also collaborating today as part of this deal to optimize Anthropic models for the best performance in future Nvidia architectures. Anthropic is committing 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, and Microsoft is also investing $5 billion.
Microsoft’s deal with Anthropic comes just weeks after the OpenAI partner completed its for-profit restructuring and reached an agreement New deal with Microsoft. The new deal with OpenAI expands Microsoft’s intellectual property rights to include models of OpenAI through 2032 and also includes post-AGI (artificial general intelligence) models. The possibility of announcing AGI was a sticking point in Microsoft’s OpenAI deal, but the pair have now agreed that the milestone will be verified by an independent panel of experts.
Microsoft and OpenAI also relaxed the exclusivity parts of their partnership further, allowing OpenAI to collaborate with third parties and release open-weight models. Microsoft also no longer has the right of first refusal to be the compute provider for OpenAI.
All of these changes to the OpenAI partnership allowed Microsoft to pursue this deal with Anthropic. Microsoft has been increasingly adopting Anthropic models across its Copilot services in recent months. In fact, Microsoft would have preferred Anthropic’s Claude 4 over GPT-5 in its new car AI model selector in Visual Studio Code. Microsoft has also brought Anthropic’s Claude Sonnet 4 and Claude Opus 4.1 to Recent Microsoft 365 Copilot users.