OpenAI's Revenue Figures Were $20 Billion Overstated — and Markets Felt It

OpenAI's annualised revenue figure, widely reported at around $70 billion based on information provided to investors, has turned out to be dramatically lower. New financial documents shared with investors show the company's annualised revenues were approaching $50 billion as of late September 2026 — a $20 billion shortfall from what had been circulating in the market just weeks earlier. The discrepancy is large enough to rattle confidence in the pace of AI demand broadly, not just at OpenAI.

The confusion traces back to a methodology mismatch. OpenAI and rival Anthropic calculate annualised revenue differently: Anthropic counts revenue flowing through cloud partners like Amazon Web Services and Google Cloud, while OpenAI does not. Investors attempting to create an apples-to-apples comparison 'grossed up' OpenAI's figures to match Anthropic's accounting approach, which inflated the reported number. Earlier in the summer, a similar process led to reports of roughly $40 billion in annualised July revenues, when the actual internal figure was closer to $30 billion — another significant gap.

Markets reacted immediately. US tech stocks fell sharply after the corrected figures emerged, with the Nasdaq 100 closing down 1.4%. The damage was concentrated in AI-adjacent hardware and infrastructure plays: Nvidia dropped 2.9%, Oracle fell 5.5%, and Micron declined 4.8%. These names have been among the biggest beneficiaries of the AI infrastructure buildout narrative, and any signal that end-demand may be softer than believed carries outsized consequences for their valuations.

The stakes extend well beyond one company's revenue line. OpenAI is currently in fundraising talks that would value it at approximately $1.4 trillion, and its revenue trajectory is the single most scrutinised metric investors use to justify that valuation. The company has projected it will burn nearly $280 billion through 2030, is lossmaking today, and has committed to massive infrastructure spending backed by partners including Microsoft, Nvidia, and Amazon. Meanwhile, it confidentially filed an IPO prospectus in June but has since delayed going public, with CEO Sam Altman signalling caution about rushing to market while AI capabilities are evolving so rapidly. OpenAI is also navigating a wave of legal challenges and government scrutiny tied to recent incidents involving its models.