An unannounced multi-year cloud contract between Anthropic and cloud provider IREN was brought into the open on October 11, 2026. The Information published an analysis that day of the economics behind Anthropic's data center leases, citing people familiar with the relationship who say Anthropic also has an undisclosed multi-year cloud deal with IREN. Neither company has commented. After the report, IREN's shares rose about 8% in overnight trading late Sunday. On its earnings call back in August, IREN had disclosed that its multi-year cloud contracts included a leading frontier AI lab whose name it could not yet reveal, and the market had been guessing ever since who that customer was.
One month earlier is worth more than $1.3 billion
What makes the analysis worth reading is that it converts Anthropic's urgency for compute into money. By its estimate, if a Louisiana data center with 245 MW of usable capacity comes online one month early, it could generate more than $1.3 billion in additional revenue. That explains why Anthropic keeps pushing its cloud partners to accelerate construction: for a company whose revenue scales with the pace at which compute comes online, the construction schedule is not an engineering issue but a revenue issue. The Information previously tallied Anthropic's cloud, chip and data center commitments signed in under a year at roughly $517 billion, corresponding to at least 14.8 GW of capacity; including earlier holdings, its compute footprint is estimated to grow from about 1.4 GW last year to roughly 5 GW this year, about 9.5 GW next year, and more than 15 GW by 2028.
Why miners, of all suppliers
IREN's other identity is that of a bitcoin miner turned neocloud provider. Named alongside it are Hut 8, TeraWulf and Nscale, operators with similar mining backgrounds. Anthropic's expansion increasingly depends on this cohort, and the reason is no mystery: miners hold what the AI industry currently lacks most — grid-connected power capacity, ready land, and experience building facilities fast. A self-built data center starts from land acquisition and grid interconnection, while converting a mining site skips the slowest part of that chain. In a market where compute is priced by the month, a supplier that can deliver early is worth more than gigawatts on a blueprint, whatever its origins.
The unconfirmed part is precisely where the risk sits
The limits of this story need stating plainly: the IREN contract's value and term have not been disclosed, neither Anthropic nor IREN has confirmed it, and for now the only evidence is The Information's single-source reporting plus the market's share-price reaction. There is also a counter-signal: research firm SemiAnalysis recently questioned the operating quality of IREN's legacy mining sites in British Columbia, citing complaints from customers and end users. For Anthropic, trading lease speed for scale hands part of its fate to these converted suppliers' ability to deliver: the other side of 245 MW being worth $1.3 billion a month early is a revenue loss of similar magnitude if it slips a month late. What to watch next is whether IREN formally confirms the customer in its next earnings report, and how much of Anthropic's near-15 GW lease map turns into genuinely usable compute on schedule.
