Anthropic is adding another major piece to its AI infrastructure buildout through a $9.1 billion data center deal with Riot Platforms, a company known as a Bitcoin miner. The agreement centers on Riot’s Rockdale site in Texas and gives Anthropic access to a large block of power and facility capacity for future AI workloads.
Bloomberg identified Anthropic as the tenant, citing people familiar with the matter. Riot had disclosed the contract a day earlier with its quarterly earnings, but described the customer only as a \"leading frontier AI lab.\"
What The Riot Platforms Agreement Covers
The contract covers 191 megawatts at Riot’s Rockdale site in Texas. According to Bloomberg, that is enough power for roughly 143,000 homes. For an AI lab, the size of the deal points to a need for long-term access not just to servers, but to the power, cooling, and operations that make high-density computing possible.
Under the arrangement, Riot will build a data center around the tenant’s requirements. Riot’s role includes providing the building, power connections, cooling, and operations. Anthropic is responsible for bringing its own servers and AI chips.
That split matters because it separates the physical site and operations from the computing hardware itself. Riot supplies the facility layer. Anthropic supplies the machines that will run AI workloads inside it.
The lease runs 20 years. It also includes two extension options, and those could push the total value to $16.1 billion. The first 96 megawatts are set to go live in December 2027, with the remainder following in June 2028.
Why Power Is Central To The Deal
The most important number in the agreement may be 191 megawatts. AI data centers are defined by computing hardware, but that hardware can only be useful when enough power, cooling, and operational capacity are available in the right place at the right time.
Riot’s commitment is not simply to rent space. The company is set to build the facility to the tenant’s specifications and provide the infrastructure needed to keep it running. That makes the deal a long-term infrastructure commitment rather than a short-term hosting arrangement.
For Anthropic, the deal gives a clearer path to future capacity. The first stage, 96 megawatts, is scheduled for December 2027. The next stage follows in June 2028. That staged timing suggests the contract is meant to support future deployment rather than immediate capacity alone.
The extension options are also significant. A 20-year lease already creates a long planning horizon. The possibility of increasing the total value to $16.1 billion shows how valuable durable data center access has become for frontier AI development.
Riot’s Role Moves Beyond A Simple Tenant Contract
Riot disclosed the contract with its quarterly earnings before Anthropic was named by Bloomberg. At that point, Riot said only that the tenant was a \"leading frontier AI lab.\" The disclosure still made clear that the company had secured a large data center customer at its Rockdale site.
The arrangement gives Riot a defined set of responsibilities. It will provide the building, power connections, cooling, and operations. Those are the physical and operational components that determine whether a data center can support demanding workloads.
Anthropic’s responsibilities are different. It must bring its own servers and AI chips. In practical terms, the agreement gives Anthropic a customized place to deploy its hardware, while Riot handles the surrounding infrastructure.
That division reflects a broader pattern in AI infrastructure deals. The AI company needs access to specialized computing capacity, but it may not want every part of the real estate, energy connection, cooling, and operations stack to sit inside its own organization. A partner with an existing site can become part of the buildout.
Part Of A Larger Anthropic Infrastructure Portfolio
The Riot Platforms lease is not the only infrastructure commitment tied to Anthropic. The company is also paying SpaceX an estimated $1.25 billion per month through May 2029 for the Colossus 1 data center.
Anthropic also plans to deploy two gigawatts of AMD GPUs. Amazon is investing up to $25 billion and building up to five gigawatts of Trainium capacity with Anthropic. In addition, gigawatts of TPU capacity from Google and Broadcom are coming online starting in 2027.
The source also identifies a six-year, $10 billion contract with Volta Infra as part of the portfolio. Taken together, these commitments show a broad push to secure multiple kinds of AI computing capacity across different providers and hardware paths.
The Riot deal fits into that picture as a power-and-facility commitment. It does not replace the other arrangements named in the source. Instead, it adds another long-term block of infrastructure to a list that already includes SpaceX, AMD GPUs, Amazon Trainium capacity, Google and Broadcom TPU capacity, and Volta Infra.
What This Signals For AI Scaling
The deal underlines how AI expansion is increasingly tied to physical infrastructure. Model development depends on chips and software, but the source makes clear that the surrounding data center capacity is also a major constraint and investment area.
Anthropic’s agreement with Riot Platforms gives the company a large future footprint at one Texas site, with clear timelines for capacity to come online. Riot provides the site infrastructure and operations. Anthropic brings the servers and AI chips.
The result is a long-term bet on data center capacity as a core part of frontier AI. With a $9.1 billion base value, a 20-year lease, and extension options that could lift the total to $16.1 billion, the agreement shows that access to power and purpose-built facilities is now central to the AI race described in the source.