Have any large companies matched the growth rates AI firms forecast?
Core argument: OpenAI's projected revenue of $145 billion in 2029 against $3.7 billion of 2024 sales implies a five-year compound annual growth rate of 108 percent, a pace no U.S. public company has sustained for five years since 1950.
The launch of ChatGPT, a GenAI technology, catalyzed a wave of investment in AI infrastructure on scale with some of the largest investment booms in U.S. history. As a result, some firms are offering growth forecasts that are historically very high. How should investors assess these projections? One sensible approach is to start with an initial belief [Bayes’ “prior”] and update that belief as new results appear. Base rates, the results for a specific reference class, are a sensible start for initial beliefs. In the fall of 2025, OpenAI projected revenue of $145 billion in 2029. The company's sales in 2024 were $3.7 billion. That reflects a 5-year compound annual growth rate of 108 percent. To assess the plausibility of this forecast, we can start with an initial belief based on what companies with $2-5 billion of starting sales have actually done. Exhibit 3 shows the results, based on a sample of nearly 18,900 firm period observations for U.S. public companies from 1950 to 2024. The data reveal that no public company has grown this fast for five years in the last three-quarters of a century. [A similar comparison of forecasts to base rates] suggests that Oracle Cloud [likewise] has a low probability of meeting [its] five-year revenue projections.


