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AIR Platforms’ Oct. 1, 2026 analysis assigned OpenAI a BB+ shadow rating and Anthropic a BBB shadow rating. Under conventional credit-market labels, BB+ is the highest speculative-grade rating—often called “junk”—while BBB is the lowest investment-grade category. These are AIR’s modeled assessments, not ratings issued by Moody’s, S&P or Fitch.

What AIR’s ratings say—and what they do not

AIR reported BB+ for OpenAI and BBB for Anthropic in an analysis it calls a shadow-rating exercise. The grades describe AIR’s own model output; they do not establish that either company has received an official credit rating from a recognized ratings agency. AIR’s analysis says the company is not registered with the U.S. Securities and Exchange Commission as a nationally recognized statistical rating organization (NRSRO), and that its assessments are not issued by an NRSRO.

The distinction matters because the headline shorthand can make a modeled result sound like a formal agency decision. “OpenAI debt is junk” is an interpretation of AIR’s BB+ grade, not a claim that a rating agency has classified OpenAI debt. Likewise, Anthropic’s BBB is AIR’s estimate, not proof the company holds an agency investment-grade rating.

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How AIR built its shadow ratings

AIR says its Financials Builder is designed to assess companies that do not publish financial statements. It combines risk profiles, publicly available financial information, sector characteristics and selected peer-company data to estimate proxy financial statements. Users can adjust the peer group and override estimated values before the tool generates what AIR describes as a first-pass approximation of private-company creditworthiness.

For Anthropic, AIR says it used reported second-quarter revenue and an operating result around breakeven alongside its own earlier estimates of assets and debt. The underlying figures in the article are blurred, and AIR directs readers seeking details to contact its representative. As a result, an outside reader cannot independently reconstruct the inputs or the rating calculation from the published analysis.

Why AIR rated OpenAI lower

AIR says the difference between the two grades comes almost entirely from the income statement. In its analysis, OpenAI’s estimated losses relative to revenue and limited interest coverage weigh on its rating. AIR says those weaknesses are partly offset by leverage it considers not extreme and a relatively liquid asset mix.

That explanation points to a central credit distinction: a company may have assets or access to financing, yet still face concern if operating performance does not generate enough to cover interest costs. AIR’s rating reflects its estimates and assumptions; the article does not provide enough unblurred underlying figures to verify how much each factor contributed.

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Why Anthropic’s BBB rating is especially conditional

AIR’s Anthropic assessment relies on a single reported quarter with operating results near breakeven. AIR describes interest coverage as very high but identifies profitability as the main weakness. One quarter near breakeven does not establish that the company can sustain that performance, so the BBB result should be read as a model outcome based on limited disclosed operating evidence—not proof of a durable earnings trend.

What could change the assessments

Potential IPO proceeds

AIR says its ratings do not include proceeds from the companies’ planned IPOs. If an offering raises primary-share capital, the proceeds could add cash and equity and ease funding or refinancing pressure. But additional cash would not, by itself, eliminate operating losses or improve weak interest coverage. IPO timing, size and pricing were uncertain in AIR’s analysis.

Audited financial statements

Published audited statements could replace estimated and peer-imputed figures in AIR’s model. That could move either assessment in either direction: better-supported financials might strengthen the case for a rating, while disclosures that differ from the estimates could weaken it.

Possible agency requests

Semafor reported on Sept. 8, 2026, that bankers for both companies were reportedly pressing for investment-grade ratings ahead of prospective IPOs. That report concerns possible future requests; it does not say that an agency had issued either company a rating. Semafor’s report is separate from AIR’s modeled grades.

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Why company-by-company debt comparisons can miss risk

Credit exposure in the AI sector may extend beyond a lab’s own balance sheet. UBS Asset Management describes a connected financing network involving AI labs, cloud operators, data centers and compute suppliers, alongside guarantees, leases and other commitments. Its analysis argues that investors should examine counterparties and contractual support—not only the issuer or a headline debt figure. UBS Asset Management’s discussion of AI debt networks provides broader context for that approach.

For OpenAI and Anthropic, AIR’s comparison is therefore one input, not a complete map of every obligation or intercompany exposure connected to their infrastructure. A fuller credit assessment would consider operating profitability and cash generation relative to interest expense, liquidity and leverage, the quality and recency of financial disclosures, sensitivity to estimated inputs and peer choices, and commitments across cloud, compute and data-center relationships.