The Unveiling of Financial Secrets
In a tech landscape buzzing with speculation and anticipation, the financial dynamics between OpenAI and Microsoft have come under intense scrutiny. Recent leaks, courtesy of tech blogger Ed Zitron, have illuminated the revenue-sharing arrangement between these two titans, revealing staggering figures that reflect the growing complexity of their partnership.
Revenue Share Insights
According to the leaked documents, Microsoft received an impressive $493.8 million from OpenAI in revenue share payments during 2024. This figure surged to $865.8 million in the first three quarters of 2025, underscoring the rapid growth of OpenAI’s revenue streams. OpenAI reportedly allocates 20% of its revenue to Microsoft, a figure that remains unconfirmed by either party but is widely accepted in the industry.
This revenue share stems from Microsoft’s substantial investment of over $13 billion into OpenAI, a relationship that has proven mutually beneficial. However, the financial picture is complicated by the fact that Microsoft also returns approximately 20% of revenues generated from services like Bing and the Azure OpenAI Service back to OpenAI. This creates a web of financial exchanges that complicates the understanding of net revenue flows.
Understanding the Financial Flow
A source familiar with the arrangement clarified that the leaked payments reflect Microsoft’s net revenue share and do not account for the revenues Microsoft pays back to OpenAI from its services. This deduction complicates the financial landscape, as Microsoft does not disclose specific earnings from Bing and Azure OpenAI in its financial reports, making it challenging to gauge the full extent of these transactions.
Despite the opacity surrounding these numbers, the leaked documents provide a rare glimpse into the financial workings of one of the hottest companies in the private market. They reveal not only how much OpenAI is earning but also the significant expenditures the company incurs in its operations.
Estimating OpenAI’s Revenue
Based on the widely reported 20% revenue share, it can be inferred that OpenAI’s revenue reached at least $2.5 billion in 2024 and approximately $4.33 billion in the first three quarters of 2025. Previous assessments from The Information had pegged OpenAI’s revenue at around $4 billion for 2024 and $4.3 billion for the first half of 2025. CEO Sam Altman has hinted at even more ambitious figures, suggesting that OpenAI’s revenue could exceed $20 billion in annualized terms by the end of 2025, with projections hinting at a staggering $100 billion by 2027.
Inference Costs: A Growing Concern
However, the financial narrative takes a turn when examining OpenAI’s inference costs. Zitron’s analysis suggests that OpenAI spent roughly $3.8 billion on inference in 2024, with that figure ballooning to around $8.65 billion in the first nine months of 2025. Inference costs, which refer to the compute resources required to run trained AI models, represent a significant cash outflow for OpenAI.
Historically, OpenAI has relied heavily on Microsoft Azure for its computational needs, though it has also begun to explore partnerships with other cloud providers such as CoreWeave, Oracle, AWS, and Google Cloud. Reports indicate that while a substantial portion of OpenAI’s training costs is covered by credits from Microsoft, the inference costs are primarily cash-based, leading to a concerning implication: OpenAI may be spending more on inference than it earns in revenue.
Implications for the AI Landscape
This financial reality raises questions about the sustainability of OpenAI’s business model and the broader implications for the AI industry. If a leading player like OpenAI is struggling to balance its operating costs with revenue, what does this signal for the multitude of startups and ventures in the AI space? As discussions about an AI bubble grow louder, the revelations from these leaked documents add fuel to the fire.
In an era where AI investments are soaring to unprecedented heights, the financial viability of these companies is paramount. As OpenAI navigates its complex financial landscape, the industry watches closely, eager to see how this partnership with Microsoft will evolve and what it means for the future of AI.
Looking Ahead
As of now, both OpenAI and Microsoft have chosen to remain silent on the leaked information, leaving many questions unanswered. The financial intricacies of their partnership will likely continue to be a topic of interest as the tech world grapples with the implications of these revelations. With the AI sector poised for further growth, the relationship between these two giants will undoubtedly shape the future of artificial intelligence.
Original story: TechCrunch
