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Anthropic locks in $9.1 billion, 20-year compute deal with Riot Platforms

· by Pondero Newsdesk

The short version

Riot Platforms disclosed a 20-year, $9.1 billion computing agreement with Anthropic on August 11, supplying 191 megawatts from its Rockdale, Texas campus through June 2048. The deal is Anthropic's third large compute commitment in three weeks.

Anthropic locks in $9.1 billion, 20-year compute deal with Riot Platforms

Three weeks after signing a $10 billion compute agreement with a Norway-based startup, Anthropic locked in another: a 20-year, $9.1 billion deal with Riot Platforms, a Bitcoin miner whose Rockdale, Texas campus will supply 191 megawatts of capacity by mid-2028.

What

Riot disclosed the deal alongside its second-quarter earnings on August 11, describing the counterparty only as "a leading frontier AI lab." Bloomberg identified Anthropic as the customer. The lease runs through June 2048. Capacity phases in over two years: 96 megawatts online by December 2027, the remaining 95 megawatts completing by June 2028. Two five-year extension options could push the total contract value to $16.1 billion, per QZ.

To fund early construction, Riot arranged a $573 million interim financing facility through Morgan Stanley. Riot CEO Jason Les said the Anthropic deal, combined with an earlier AMD capacity agreement, brings the company's total signed megawattage to 241 and long-term contracted revenue to roughly $9.8 billion. Riot shares fell 5.46% on Monday before the announcement and then surged more than 25% in after-hours trading.

Why it matters

Bitcoin mining companies own something AI labs cannot quickly replicate: existing land parcels, high-voltage substations, and grid interconnections that took years to permit and build. Riot's Rockdale campus holds all three. By contracting directly with a miner rather than waiting for new data center construction, Anthropic secures megawatts that would otherwise require a multi-year permitting cycle.

Operators running Claude at scale should note the timing: the 96-megawatt phase-one block arrives December 2027, with the remaining capacity following six months later. That's the earliest realistic window for Anthropic's API capacity to reflect the full Riot buildout. For teams hitting rate limits now, a meaningful relief valve is at least 16 months out.

The broader signal is the pace of Anthropic's compute accumulation. The Volta Infra Holdings agreement ($10 billion, six-year, Norway) came August 4. Bloomberg reported in May that Anthropic agreed to purchase roughly $45 billion in compute from xAI. Earlier arrangements included SpaceX, AMD, and Akamai. The total contracted compute now suggests Anthropic's capacity planning has outgrown what any single hyperscaler relationship can supply.

Context

Riot's path to AI infrastructure is indirect. The company operated as Bioptix, a biotech diagnostics firm, before rebranding as a Bitcoin miner. Its Rockdale campus was built to support energy-intensive mining operations. That same footprint, including the electrical infrastructure, is now the asset Anthropic is buying access to.

Riot's Q2 results, released alongside the deal announcement, show the scale of the ongoing pivot. Total revenue came in at $174.2 million, up 14% from $153 million a year earlier, per QZ. Bitcoin mining contributed $113.7 million; data center hosting added $23.2 million. The company posted a net loss of $237.2 million, or $0.68 per diluted share, compared with net income of $219.5 million in the prior-year quarter, largely reflecting depreciation and financing costs tied to the data center build.

What to watch next

The December 2027 phase-one milestone is the first concrete sign of whether Riot executes on the construction timeline. Watch also for similar announcements from Marathon Digital, CleanSpark, or Core Scientific: if those companies disclose comparable AI compute agreements in the months ahead, it would confirm a sector-wide infrastructure pivot rather than a Riot-specific repositioning.

Sources