The breakup that kept paying: Microsoft OpenAI revenue
A year ago, Microsoft and OpenAI rewrote the most consequential partnership in artificial intelligence. The exclusivity ended, but the Microsoft OpenAI revenue kept flowing. OpenAI was free to take its workloads to rival clouds, and Microsoft gave up the hold it had kept on the startup it had backed with more than $13 billion.
Then the numbers arrived. In the quarter ended September 30, Microsoft recorded $10 billion in revenue from commercial arrangements with OpenAI, including revenue-sharing payments. That is nearly 11% of Microsoft’s $92.3 billion in total revenue for the quarter — the first quarter of its fiscal 2027. The divorce, it turns out, was only ever a restructuring of the money.
This is the detail that makes the headline worth a second look. The $10 billion is not a single stream with a single story behind it. It is a combined figure, spanning revenue-sharing payments and Azure cloud services, and Microsoft has not said how much comes from each. TechCrunch has asked. Until Microsoft answers, anyone telling you exactly what the $10 billion means is guessing at the mix.
What the filing actually says
Start with what is documented, because the documented part is already remarkable enough. Microsoft’s quarterly report on Form 10-Q discloses $10.0 billion of revenue from commercial arrangements with OpenAI, inclusive of revenue-sharing payments, for the three months ended September 30, 2026. For the full 2026 fiscal year, revenue from OpenAI arrangements hit $24.1 billion. At the latest quarter’s pace, the annualized figure would be about $40 billion — arithmetic, not a forecast, and worth labeling as such, because a single quarter is not a run rate.
Alongside the revenue sits a second number that deserves equal attention: $7.2 billion in outstanding receivables from OpenAI at the end of September, up from $6 billion at the end of June. That is money OpenAI owes for previous transactions, not additional revenue and not cash in hand. Ignore it, though, and you miss the fact that a meaningful chunk of the OpenAI relationship is still waiting to be collected.
Then there is the stake. Microsoft’s ownership interest in OpenAI declined from about 25% in June to about 24% in September, continuing a gradual slide from roughly 27% after the October 2025 recapitalization. Microsoft did not say what caused the dilution. The direction, though, is consistent: a declining ownership stake alongside a substantial latest-quarter revenue figure.
The terms that outlived the exclusivity
The mechanism behind the money is not mysterious, even if its exact proportions are. Under an agreement reached in April 2026, OpenAI continues sharing revenue with Microsoft through 2030, subject to a cap, while being free to work with competing cloud providers. OpenAI reportedly shares 20% of its revenue with Microsoft under an earlier deal — a figure neither company has publicly confirmed, which means it should be reported as reported, not as fact.
And the October 2025 loosening came with its own price tag. In exchange for its freedom, OpenAI committed to buying an additional $250 billion in Azure services. Read the two deals together and the shape of the new relationship comes into focus: OpenAI can work with other clouds, but a $250 billion Azure purchase commitment and a revenue-sharing obligation both run to Microsoft, for years.
That is the tollbooth logic, stated plainly and without exaggeration. Microsoft no longer holds OpenAI exclusively. It does not need to. The contracts convert a former exclusive partner into a durable revenue line.
Meanwhile, they compete
Here is the part that would have sounded absurd three years ago: the two companies increasingly compete for the same customers.
This is the tension at the heart of the story, and it cuts both ways. A skeptic could reasonably argue that the $10 billion overstates the partnership’s economics — that much of it may be Azure infrastructure OpenAI would buy anyway, and that the shrinking stake plus OpenAI’s freedom to use rival clouds point to a normalizing commercial relationship rather than a deepening dependency. That skepticism is healthy, and the undisclosed split is exactly why it cannot yet be settled.
But the skeptic’s case has its own limit. Normal commercial relationships do not typically deliver a tenth of a $92.3 billion quarter, or $24.1 billion across a fiscal year, or a $250 billion purchase commitment. Whatever you call this arrangement, “normal” is doing a lot of work.
What to watch
Three questions will settle how this story reads a year from now. First, the split: how much of the $10 billion is revenue-sharing and how much is Azure? The answer determines whether Microsoft is primarily OpenAI’s landlord, its tax collector, or both. Second, the dilution: what is steadily shrinking Microsoft’s stake, and does it keep shrinking? Third, the pace: does the $10 billion quarter repeat, or was September flattered by one-off arrangements?
For now, the honest summary is also the striking one. Exclusivity ended. The revenue did not. And the former partner is now also a competitor — one that pays Microsoft, quarter after quarter, for the privilege of competing with it. The partnership did not break up. It renegotiated, and the renegotiation pays.
