Anthropic began its IPO push last week with financial disclosures that covered only the first half of the year. Its amended S-1, filed Monday, filled in the crucial third-quarter picture — a period that investors are scrutinising because AI economics can change with startling speed.¹

The growth case is hard to miss. Anthropic reported about $17 billion in third-quarter revenue, up from $11.6 billion in the prior quarter and more than 12-fold from a year earlier. Revenue for the first nine months reached $33.24 billion, roughly 1,200% above the comparable period a year earlier.² For supporters, the figures show that enterprise demand for Claude is arriving at a scale few software businesses can match.

But the revised filing also puts a price tag on that momentum. Anthropic disclosed $895.4 billion in purchase commitments and lease agreements, “substantially all” tied to compute and infrastructure. Nearly $70 billion falls due in the 12 months after Sept. 30, while roughly $447.5 billion is expected by the end of 2030.³

The costs are already cutting into the numbers. Anthropic swung from $974 million in operating income in the second quarter to a $567 million operating loss in the third, saying the reversal was “primarily driven by $5.0 billion of compute under short-term commitments.” Compute and infrastructure charges climbed to $9.9 billion, four times their level a year earlier.⁴

The headline $23.29 billion quarterly net loss — and $104 billion loss for the first nine months — is complicated by non-cash accounting charges, including liabilities tied to convertible notes. Still, the broader warning is plain: even a potentially record-setting IPO may not fully finance the infrastructure race. Anthropic had $146.6 billion in cash and accessible investments at quarter-end, but investors must decide whether revenue can keep pace with commitments stretching through 2045.¹