IREN has delivered its first AI cloud deployment to Microsoft under a reported $9.7 billion agreement, moving the data center operator from a signed contract into live execution of hyperscale AI compute capacity.

Key points

• IREN delivered Horizon 1, its first AI cloud deployment, to Microsoft.
• The deployment falls under a $9.7 billion agreement to supply AI cloud infrastructure.
• IREN also achieved NVIDIA Exemplar Cloud status on the GB300 NVL72 platform.

What IREN delivered to Microsoft

IREN said it delivered Horizon 1 to Microsoft and achieved NVIDIA Exemplar Cloud status on the GB300 NVL72 platform, according to the company’s announcement. The delivery marks the first live deployment tied to the Microsoft engagement. For related coverage, see Bitmain Announces First U.S. Mining Factory by 2025.

The GB300 NVL72 is NVIDIA’s rack-scale AI system, combining 72 Blackwell Ultra GPUs in a single liquid-cooled rack linked by NVIDIA’s NVLink interconnect, a hardware class aimed at large-scale AI training and inference workloads. NVIDIA’s Exemplar Cloud status is a designation the chipmaker grants to cloud providers whose deployments meet its standards on the platform, so earning it alongside the first delivery points to a build completed to NVIDIA’s specifications rather than to the company’s own claims alone.

The deployment sits under a $9.7 billion agreement to deploy AI cloud infrastructure for Microsoft. The company also disclosed the arrangement in a filing with the U.S. Securities and Exchange Commission.

Microsoft is a significant customer because it is one of the largest buyers of AI compute globally, and a hyperscaler anchoring the contract signals sustained demand for the capacity IREN is building. Microsoft has also been steadily increasing its data center capital spending as it expands AI capacity for Azure. The relationship builds on IREN’s broader pivot toward AI infrastructure alongside its Bitcoin mining operations; the company, formerly known as Iris Energy, built its data center fleet for mining before adding AI cloud capacity. For related coverage, see IREN Grants Co-CEOs $700M in RSUs Equal to 5% of Shares Outstanding.

Why the Microsoft deal matters for AI infrastructure markets

A first deployment under a large agreement points to execution progress rather than a partnership that exists only on paper, distinguishing the Horizon 1 delivery from a purely announced deal, as reported by the Associated Press.

The scale of the reported agreement reflects continued demand for large-scale AI compute and cloud capacity, the same trend driving Bitcoin miners to repurpose infrastructure. IREN is not alone in this shift, following deals such as Anthropic’s $9.1 billion compute agreement with Riot, HIVE’s five-year AI cloud contract, and Core Scientific’s multi-year hosting contracts with CoreWeave, which established the template of miners converting purpose-built mining sites into AI data centers.

Investors and industry watchers are likely to track execution milestones under such agreements, because delivered capacity, rather than contract value alone, determines revenue realization. If additional deployments follow the first, they would indicate that IREN can scale the engagement toward the full agreement value.

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