Anthropic Quietly Signed a Cloud Deal With Ex-Bitcoin Miner IREN as Its Leased Compute Pipeline Reaches 15 Gigawatts

Anthropic's compute buildout has a new, less glamorous supplier. The Information reports that the Claude maker holds an undisclosed multiyear cloud deal with IREN, an Australia-listed company that until recently was best known as a bitcoin miner. IREN disclosed an unnamed frontier AI client back in August; the report now effectively names it. Neither side has announced terms, and the value and length of the contract were not disclosed.

Why a crypto miner? Because Anthropic's capacity race increasingly runs through companies that happen to hold scarce grid connections at former smelter and industrial sites. The report notes the sprint now depends on current and former bitcoin miners such as Hut 8, TeraWulf, IREN and Nscale - operators whose core asset is not chips but power.

The scale behind the deal is large. Anthropic has signed data-center leases with more than ten providers including AWS and Google, totaling around 15 gigawatts and roughly $530 billion of committed investment, according to figures cited in the coverage. Its deployed compute is projected to grow from 1.4 gigawatts last year to 5 gigawatts this year, 9.5 gigawatts next year and beyond 15 gigawatts by 2028.

The economics run on a clock, not a quarter. Analyst math cited in the report focuses on a 245 megawatt site in Louisiana - developed by Hut 8, operated by Fluidstack and set to run Google TPUs from the second quarter of next year. At full inference utilization the site would generate roughly $1.3 billion a month in revenue against about $200 million a month in chip rental, an 85% gross margin before training and staffing costs. That is why a month of delay is measured in billions, and why Anthropic is pressing partners on construction timelines.

That arithmetic also helps explain a datapoint that would have sounded unlikely a year ago: Anthropic recorded a small profit in the second quarter of this year, after reportedly spending $2.30 in operating costs for every $1 of revenue last spring. Inference on leased hardware that is switched on and billing is a different business from the training-era burn rate.

The caveats are real. The IREN deal rests on people familiar with the relationship rather than a company announcement, and the leased pipeline is a fixed-cost bet: analysts note margins could narrow as this year's leasing accelerates, that Microsoft and Meta have already trimmed Anthropic-related spending, and that competition with OpenAI is intensifying. Anthropic is reportedly preparing to meet investors ahead of a planned IPO, which makes every month of energized capacity a revenue line that lands directly in the financials.

Structurally, the pattern - labs leasing, chipmakers guaranteeing, ex-miners energizing - is hardening into the standard architecture of the AI buildout. For IREN, a frontier-lab contract converts a mining company's balance sheet into an infrastructure one. For Anthropic, every additional gigawatt is a bet that inference demand keeps growing faster than the obligations needed to serve it.