Leaked documents suggest OpenAI paid Microsoft $493.8 million in revenue share in 2024 and $865.8 million in the first three quarters of 2025, tied to a reported 20% revenue-sharing agreement linked to Microsoft’s $13 billion investment. Because Microsoft also shares about 20% of Bing and Azure OpenAI revenues back to OpenAI, the leaked figures reflect net payments from OpenAI to Microsoft. Based on these numbers, OpenAI’s revenue is inferred to be at least $2.5 billion in 2024 and $4.33 billion in the first three quarters of 2025, with Sam Altman projecting more than $20 billion in annualized run rate and potentially $100 billion by 2027. Separate analyses suggest OpenAI may have spent around $3.8 billion on inference in 2024 and $8.65 billion in the first nine months of 2025, much of it in cash, raising questions about whether the company is spending more on serving its models than it currently earns.