Anthropic’s cloud partnerships are becoming increasingly messy.

According to an S-1 filing leaked to The Wall Street Journal, Anthropic has faced difficulties in securing sufficient cloud capacity from AWS, Google, and Microsoft—companies that increasingly view the maker of Claude as a competitor rather than a customer.

The leaked document provides further details on figures previously reported by Reuters and the Financial Times in late September, including Anthropic’s projection that it could spend over $750 billion on cloud contracts, some of which are still under negotiation.

Even so, this may not be enough. Anthropic currently leases its own data centers and works with third-party data center operators; however, the company has expressed concerns that these operators have a “limited operating history,” which could mean they are less reliable than hyperscale data center providers.

This massive expenditure follows a net loss of $80.7 billion for the first half of the year. According to The Wall Street Journal, the company generated $16.3 billion in revenue during the same period, with just two customers accounting for approximately one-fifth of its total sales.

The filing builds upon previously disclosed risks regarding “catastrophic” outcomes, warning that Anthropic could be held liable for damages caused by harmful AI behavior—potentially in amounts exceeding its available insurance coverage.

Last week, the company informed potential investors that its third-quarter revenue alone reached $16.8 billion, a 45% increase over the previous quarter. Anthropic is reportedly planning an IPO for November.

Anthropic has not yet responded to a request for comment from TechCrunch.