What happened
According to a Financial Times report relayed by Valor Economico, Blackstone told investors that Anthropic may not receive an investment-grade credit rating immediately after its planned initial public offering. The private-equity firm is an anchor investor in Anthropic’s latest chip-financing transaction, called Project North Star.
The transaction is reported at $63 billion. Blackstone had previously indicated to investment partners that it expected Anthropic to achieve investment grade before year end. More recently, however, it reportedly said that guidance from major credit-rating agencies pointed instead to a rating in the high end of speculative grade, in the BB range or above, following the IPO.
The distinction matters because investment-grade borrowers generally have access to a broader and cheaper pool of capital. The report says many pension funds and insurers are restricted from taking meaningful positions in speculative-grade borrowers. If Anthropic is rated below investment grade, its ability to finance large infrastructure commitments directly could therefore be more constrained, and it may need to continue relying on suppliers with stronger ratings.
Anthropic filed for an IPO on Monday, according to the report, ahead of what could become the largest public offering in history, expected next month. Its filing describes plans to invest more than $800 billion in computing infrastructure through 2045. The company has more than $112 billion in cash and cash equivalents, the report says, and investors estimate that the IPO could raise roughly another $100 billion.
Project North Star is intended to finance Anthropic’s lease of 1.5 gigawatts of Google semiconductors. Wall Street banks completed the transaction earlier in the week. More than $42 billion of senior debt is backed by Broadcom, which co-develops the chips and has an investment-grade rating in the A range. A further $18 billion of junior debt is backed by Anthropic’s lease payments. The senior structure has priority over junior debt in a default, which helps explain institutional demand for it.
The report says Blackstone funds invested $9 billion in the junior debt at a yield above 10%. Kroll Bond Rating Agency assigned the $18 billion junior tranche a BB+ rating with a positive outlook, an improvement from the stable outlook assigned to a similar Project Big Sky transaction four months earlier. The report does not say that Fitch, Moody’s, or S&P has assigned Anthropic a rating.
What the archive adds
This is a new fact on a known financing story. Earlier coverage examined the reported above-10% yield Blackstone was offered to support a chip deal, framing frontier compute as a credit-risk issue: Anthropic’s Blackstone financing. It also follows the IPO filing’s disclosed growth, losses, and investor debate: investor reaction to Anthropic’s S-1.
Trend signal
No supplied Pattern directly fits. The evidence concerns the financing terms behind a single company’s infrastructure expansion, not a demonstrated shift in how agent systems, software interfaces, or teams operate.
Why now
The reported revision arrives as Anthropic prepares for an IPO expected next month and seeks capital for a long-horizon compute plan. Project North Star has also just been completed by Wall Street banks, making the rating expectation relevant to how its debt may be distributed to other investors.
Connections to other events
The report strengthens the context of the earlier Blackstone debt story: a yield above 10% on junior financing and a possible speculative-grade corporate rating are separate signals, but both put a price on the risk that future Anthropic cash flows must support large compute obligations. An earlier Field Note also covered Anthropic’s reported quarterly revenue growth and adjusted profitability claims, while cautioning that they did not establish durable unit economics: Anthropic’s investor update.
Why it matters
Teams using Anthropic models do not face an announced product, API, or price change from this report. The relevance is structural. Frontier-model providers increasingly need to translate demand for model access into multiyear commitments for chips, data centers, and power. Their financing capacity can influence how quickly capacity is added, how much risk suppliers retain, and ultimately how resilient service economics are during periods of heavy demand.
The North Star structure is especially notable because it separates senior debt supported by a highly rated supplier from junior debt tied more directly to Anthropic’s lease payments. That is a reminder that an AI company’s apparent scale and revenue growth are not the same thing as low-cost access to infrastructure capital. Builders making long-lived platform commitments should distinguish current model quality from the financial arrangements needed to maintain the capacity behind it.
Limits and uncertainty
This is a report about Blackstone’s guidance to investors, not a final corporate credit rating. The article attributes the expectation to people familiar with the matter and does not provide a public assessment from Fitch, Moody’s, or S&P. A BB-range estimate can change as an IPO, financial disclosures, debt structures, and agency reviews develop. The report also does not establish whether a speculative-grade rating would alter Anthropic’s product roadmap, API availability, pricing, or the actual cost of service for customers.
Reader takeaway
Anthropic’s compute expansion is not only a question of chips and demand. It is also becoming a question of credit quality: the reported expectation of a BB-range rating suggests that parts of the company’s infrastructure plan may require expensive capital or highly rated counterparties, even after an IPO.
Open question
Will Anthropic secure an investment-grade rating later, and if not, how much of its future compute build-out will need supplier-backed or similarly structured financing?