Anthropic files its IPO prospectus and discloses compute commitments of between $518 billion and $807 billion

By AI Secret (Magna Ding & Ben) · October 30, 2026.

The email is the "Friday Deep Dive" installment of the AI Secret newsletter, titled "Musical Chairs With Landlords." Its subtitle is "The $800 billion bill behind Anthropic's IPO," referring to the roughly $800 billion bill behind Anthropic's stock market listing.

According to the introduction, Anthropic filed its IPO prospectus this week. For the first time, the document shows the public how much compute capacity a leading AI company has committed to buy.

The text states that, depending on who does the math, the total falls between $518 billion and $807 billion. The prospectus names eight counterparties.

The authors note that each of those eight counterparties has its own creditors, its own side bets and its own bad news, which, according to the email, came out the same week. They sum it up with a metaphor: one company opened its books and the leverage of the whole block showed through the walls.

From that point on, the content is paywalled. The email displays the notice "Upgrade to continue reading" and asks readers to become paying AI Secret members to access the rest. As a result, the body received does not include the breakdown of the eight counterparties, the amounts for each, the methodology explaining the gap between the low and high figures, or the authors' analysis. Nothing further can be stated on those points.

By way of context on the newsletter itself, AI Secret describes itself as one of the largest AI newsletters, with more than 1.5 million members. That figure is the publication's own claim.