WEEKLY INTEL BRIEF · AI, MARKETS AND COMPUTE · WEDNESDAY, OCT 28, 2026
BOTTOM LINE
Anthropic's IPO filing, made public Monday, is the clearest look yet at what frontier AI costs to run. First-half revenue rose 14x to $16.3 billion. Compute fell from 251% of revenue to 48% in six quarters, and Q2 brought the first quarterly operating profit in the filing.
The bill keeps growing. Since the start of 2026, Anthropic has signed about $417 billion in new compute commitments, with $125 to $150 billion more planned for 2028-31. It still expects to buy pricier short-term compute when demand outruns its contracts. For compute buyers, the largest customer in the market is locked in for years and still bidding for spare capacity.
Compute and infrastructure expense fell from 251% of revenue in Q1 2025 to 48% in Q2 2026. Source: Anthropic Form S-1 (SEC EDGAR). AIW chart.
KEY DEVELOPMENTS
1. The compute bill, in plain numbers
Compute and infrastructure cost $8.9 billion in the first half, more than all of 2025 ($7.3 billion). Revenue grew faster. In Q2, Anthropic took in $11.6 billion and spent about $5.6 billion on compute, so it earned roughly $2 for every compute dollar. That ratio was 0.4 in Q1 2025.
The filing says the commitments made after Dec 31, 2025 carry about $417 billion in future minimum payments. Most are compute and data center leases and cloud purchase commitments starting in 2026-27, with terms from under a year to 20 years. Note the framing: this is new deals since January, not the total. Fixed and minimum commitments stood at about $265.6 billion on June 30, up from $54.6 billion at year-end. Leases signed but not yet started rose from $50.2 billion to $321.4 billion.
Analysts add these up differently. Fortune put total future compute spending at $542 to $567 billion in one count and up to $808 billion in another, once chip leases are included. Fortune also found that 76% of the dollar value in the main infrastructure contracts is non-cancelable. The different totals come from overlapping categories in the filing, so treat any single headline number with care.
2. Who supplies the compute
Anthropic trains and serves Claude on four chip families: AWS Trainium, Google TPUs, Nvidia GPUs and AMD GPUs. It calls them a single, fungible pool. The contracts split into two kinds.
Hyperscalers get guaranteed minimums. Anthropic must spend at least $114.5 billion with Google, $110.0 billion with Amazon and $44.9 billion with Microsoft, and pays the shortfall if it uses less.
GPU clouds get flexible deals. SpaceXAI (Nvidia GPUs) is up to $120.5 billion into 2029, about $3.1 billion a month once all capacity arrives in December, and either side can exit on 90 days' notice after early 2027. Nscale (up to about $44.6 billion) and Lambda (about $41.3 billion) are paid as capacity is delivered and accepted.
It is also buying hardware. Under finance leases for chips placed in dedicated data centers that others run, rent totals about $161.2 billion before interest. Fortune calls this a new "hybrid" approach. AMD can buy up to $5 billion of Anthropic stock as its MI450 systems are deployed, and Amazon up to $15 billion tied to capacity milestones.
Google, Amazon and Microsoft contracts are minimums Anthropic owes even if unused. SpaceXAI, Nscale and Lambda are capped or pay-as-delivered, with exits. Source: Anthropic Form S-1 (SEC EDGAR), commitments disclosures. AIW chart.
Sources: Anthropic S-1, Fortune takeaways, Fortune by the numbers
3. The $63 billion Broadcom deal
On Monday, Bank of America, Blackstone, Citi and Morgan Stanley announced a $63 billion structure. A new special-purpose vehicle buys Broadcom accelerators and networking and leases them to Anthropic, with deliveries from 2027. Broadcom backs the hardware's resale value up to the size of the first-lien loans. The S-1 adds that Anthropic can issue Broadcom up to $42 billion of convertible notes to help pay the rent.
The debt sits off the lab's books, and the chipmaker stands behind the collateral. Suppliers are increasingly lenders and investors too. EO notes that partners are often suppliers, investors and lenders at the same time. Chamath Palihapitiya flagged on X that some investors compare this kind of GPU finance to airlines leasing their fleets.
Sources: Broadcom release, Anthropic S-1, EO, Chamath on X
4. Margins and risks
Q2 operating margin was 8%. Fortune reports an adjusted operating margin of 19%, which excludes stock pay and other items. The filing warns that margins may shrink as big blocks of compute come online, because costs are booked before the revenue they support.
The main risk is a mismatch. Fortune points out that most customer contracts let customers cut usage or leave on short notice, while Anthropic's compute bills run for years. Remaining contracted revenue was about $10.8 billion in June, and 75% of it is recognized within a year. Anthropic also says it has underestimated its compute needs before.
Power and permits are named too. The risk factors say some state and local governments are considering or have approved moratoriums on new data centers, which could delay facilities it depends on. AIW's tracker counts 725 local and state moratoria in force as of Oct 28.
ALSO NOTABLE
Anthropic says it buys most compute 12 to 18 months before it is available, under multi-year contracts. S-1
Revenue grew 1,368% year over year in Q2, while compute expense grew 300%. S-1
Fortune's count shows Anthropic got about $2 of revenue per compute dollar in Q2. That is a 50% gain on revenue per compute dollar from Q1. Fortune
NUMBERS TO KNOW
~$417 billion: new compute commitments signed after Dec 31, 2025. S-1
48%: compute as a share of Q2 revenue, down from 251%. S-1
$3.1 billion: expected monthly payment to SpaceXAI at full capacity. S-1
$161.2 billion: rent under Anthropic's chip finance leases, before interest. S-1
76%: share of main infrastructure contract value that is non-cancelable. Fortune
WHAT TO WATCH
Week of Nov 9: IPO marketing reportedly begins. Share count and price range are not yet set. Reuters via Investing.com
December: SpaceXAI capacity is due to be fully delivered. S-1
2027: Broadcom SPV deliveries start, and the first SpaceXAI exit windows open. Broadcom
WHAT IT MEANS FOR COMPUTE BUYERS
Anthropic plans 12 to 18 months ahead and still expects to buy more short-term compute, at higher unit cost, when demand runs past its contracts. When the biggest buyer is also bidding for spare capacity, on-demand capacity gets scarcer and pricier. Its GPU-cloud contracts can be cut on short notice, while hyperscaler minimums can't. Expect providers to push other customers toward longer terms. Lock in delivery dates and exit terms early, and ask who finances the hardware.
AIW Tear Sheet is published by American Intelligence Works.