OpenAI’s Revenue Estimate Raises Questions About AI Growth

OpenAI’s annualized revenue was approximately $50 billion at the end of September, according to Axios, about $20 billion below a figure previously reported to investors. The difference is tied partly to how OpenAI and rival Anthropic account for sales made through cloud partners.

Annualized revenue is a run-rate estimate that projects a recent period’s sales across a full year. It is not the same as audited annual revenue, and it can change quickly as customer usage and accounting classifications change.

Why the difference matters

The earlier $70 billion figure was based on information shared with investors and was intended to make OpenAI’s revenue more directly comparable with Anthropic’s. Axios reported that both companies follow generally accepted accounting principles, but they treat some partner transactions differently.

For example, when a customer pays $100 for an AI service through a cloud provider, Anthropic can record the full amount as top-line revenue and list the cloud provider’s share as an expense. OpenAI records only its share of certain partner sales. The difference depends on how each company defines its role in the transaction and its relationship with the customer.

What the numbers show

The revised figure does not by itself prove that OpenAI’s customer demand has weakened. It does show why private-company run-rate estimates need context, especially when they are used to compare AI companies with different business models and distribution arrangements.

OpenAI’s own public description of its business model says it earns revenue from growing use of its products through consumer subscriptions, enterprise offerings and usage-based APIs. That framework is consistent with a business that can grow quickly while still reporting different totals depending on how partner-delivered sales are measured.

What to watch next

The important questions are whether OpenAI’s revenue continues to grow, how much comes from enterprise customers, and whether the company or its investors publish a consistent definition for annualized revenue. Comparable disclosures from other AI companies will also help clarify whether reported gaps reflect demand, accounting methods or both.

For now, the most defensible conclusion is narrower than the headline numbers suggest: OpenAI remains a rapidly growing AI company, but its reported revenue figures cannot be compared meaningfully without understanding the accounting treatment behind them.

References

1. Mills, M. (2026, October 8). OpenAI annualized revenue $20 billion less than previously reported. Axios. https://www.axios.com/2026/10/08/openai-50-billion-arr-anthropic-revenue-accounting
2. Mills, M. (2026, September 29). Scoop: OpenAI’s annual recurring revenue nears $70B. Axios. https://www.axios.com/2026/09/29/scoop-openais-annual-recurring-revenue-nears-70b
3. Friar, S. (2026, September 8). The work now within reach. OpenAI. https://openai.com/index/the-work-now-within-reach/