Anthropic's $895 Billion Compute Bill Meets Its Bankers

By Grace Kim

Anthropic has pledged $895.4 billion in data center spending stretching to 2045, and its updated IPO prospectus shows who's on the hook if the math breaks. That figure, disclosed this week alongside third-quarter results, is the concrete price of CEO Dario Amodei's stated vision of AI so powerful it feels like "having a country of geniuses in a data center."

The quarter itself showed the squeeze: margins compressed as computing costs rose, even as revenue grew 45% quarter-over-quarter and more than 1,000% year-over-year.

Who bears the risk when Anthropic rents its chips?

The boldest number sits inside a $63 billion equipment-financing deal announced Oct. 26. Bank of America, Citi, Morgan Stanley and Blackstone will finance a newly formed company that buys Broadcom chips and networking equipment and leases them to Anthropic. Deliveries start in 2027; Anthropic pays rent over time.

If Anthropic defaults, Broadcom covers the gap between 72.5% of the remaining lease balance and the equipment's resale price. On $100 owed and a $60 sale, Broadcom pays $12.50. Its maximum potential liability reaches roughly $43 billion once the equipment is deployed.

Gil Luria, head of technology research at D.A. Davidson, says Broadcom had little choice. "In order to stay competitive with Nvidia's support of its customers, other large semis companies like Broadcom and AMD have had to step in to support their customers as well," Luria said. He upgraded Broadcom to buy on Oct. 27.

Recovery also depends on the hardware's secondhand market. "Custom TPUs generally have greater re-leasing risk than Nvidia GPUs because they are designed for a more specialized ecosystem and have a narrower pool of potential users," Andrew Giudici of credit-rating agency KBRA told Fortune. Residual-value support like Broadcom's "effectively transfers a portion of that risk to the support provider," he said — which makes the supplier's own creditworthiness part of the credit analysis.

How concentrated is the funding web?

Columbia Business School professor Stijn Van Nieuwerburgh flags the systemic angle: cash-rich suppliers can absorb losses, but weak AI demand would hit their sales and their guarantee payouts simultaneously. "Separate contracts can transmit the same underlying demand shock across multiple balance sheets," he said. "Individual loans can become safer while the broader system becomes more concentrated but also harder to assess."

Two of Anthropic's most important backers are themselves spending beyond their cash flow. Amazon reported negative free cash flow of $42.4 billion over the trailing 12 months, driven by AI equipment investment. Alphabet's free cash flow was negative $9.1 billion in the third quarter. Both can still borrow readily — but support for Anthropic now competes with their own buildouts for capital.

What does the convertible-note facility mean for shareholders?

Under a March 2026 agreement, Anthropic can issue up to $42 billion in convertible notes to Broadcom to cover eligible quarterly rent. Notes normally carry 9% interest, added to the debt, and convert into shares at 90% of market price. If specified revenue conditions go unmet, the rate jumps to 13% and conversion drops to 85% — more dilution for existing holders. Sustained failure can cut off further funding. Anthropic says the growth thresholds sit significantly below its recent actual growth.

Google and AMD tie funding to hardware too: Google funds unlock as Anthropic takes on TPU lease obligations; AMD's investment arrives as its GPUs hit delivery and deployment milestones. "Hardware-linked equity investments expose Amazon and AMD without making them blanket guarantors," Van Nieuwerburgh said.

Does the IPO buy flexibility?

Anthropic held $146.6 billion in liquidity at Sept. 30 — cash, short-term investments and bank credit. Through Anthropic Direct, it secures data-center space first and orders chips later, replacing expensive short-term compute with cheaper long-term capacity as facilities come online. Equipment accounts for roughly two-thirds of a representative project's cost in Van Nieuwerburgh's research; the rest is facility and power.

The risk: a powered facility "could certainly become a stranded asset if data center demand ultimately disappoints," Van Nieuwerburgh said. And commitments disclosed at $895 billion exceed an earlier estimate of roughly $600 billion, likely pushing borrowing costs above investment-grade spreads.

The key question, as he put it: whether revenue compounds fast enough to outpace compute cost. Supplier financing builds the data centers; only end-customer revenue pays for them.