OpenAI’s own figure to investors was approaching $50 billion at the end of September, counted its way: Azure resale booked net, only OpenAI’s cut. Investors then added the estimated cloud-partner revenue so the total could be lined up with Anthropic, which books the full customer bill through AWS and Google and treats the platform fee as a cost. That add was about $20 billion, which is how the late-September reports got to roughly $70 billion.