Blackstone expects a 'high junk' credit rating for Anthropic after its IPO: expensive debt for large-scale AI

By Dealroom · October 31, 2026.

According to a Dealroom headline, alternative investment manager Blackstone now expects Anthropic to receive a 'high junk' credit rating after its initial public offering (IPO). That is all the material contains: we do not have the full text, debt figures or Blackstone's reasoning. For that reason, we do not attribute to anyone more detail than the headline provides.

A note on terminology. 'Junk', or junk bonds, refers to debt rated below investment grade, meaning it carries a higher risk of default and therefore pays higher interest. 'High junk' usually refers to the least risky end of that category, although the headline does not specify the exact scale.

Here is our take. A rating like this is not the same as saying the company will go bust. It reflects the fact that building frontier AI demands enormous spending on compute and data centers, with revenue that is growing fast but does not yet have a long track record of stability. In other words, credit markets tend to treat these companies more as growth bets than as stable utilities.

More broadly, this matters beyond Anthropic. If the capital needed to train and serve models is expensive, the advantage goes to whoever has the balance sheet or deep-pocketed partners, and that reinforces the concentration of power, one of the real near-term risks. In the long run, the optimistic thesis does not depend on any one company's rating, but on the cost of intelligence continuing to fall until it becomes abundant.

Until Blackstone's full analysis is available, this should be treated as a signal about the market's risk appetite, not as a verdict on Anthropic's financial strength.