Microsoft-OpenAI 2023 Deal: Reported $10B & Azure Terms

A third round, described but not priced

Microsoft and OpenAI announced the deal on January 23, 2023, calling it the third phase of their partnership after rounds in 2019 and 2021. Microsoft's post described it as a "multiyear, multibillion dollar investment," and neither company's statement named a figure. [1]

The stated terms were about scope, not equity: Azure would remain OpenAI's exclusive cloud provider across research, products and the API, and the money would fund the supercomputing systems OpenAI trains its models on. [1]

Where the ten billion dollars came from

The ten billion dollar number that stuck to this deal came from reporting, not from either company's own words. Coverage attributed a proposed structure, giving Microsoft a claim on three quarters of OpenAI's profits until it recovered up to ten billion dollars, to unnamed sources rather than a company statement. [3]

Atlas interpretation: Microsoft's decision to confirm the round while withholding the number let the widely reported figure stand in for an official one. A reader tracing the ten billion dollar figure back to its source finds a proposal described by reporters, not a disclosed term. [3]

That same reporting put an implied valuation on OpenAI, in the tens of billions of dollars, well above what its 2019 round had implied. The gap between a valuation built on a proposed equity stake and one either company actually confirmed is the same gap that runs through the ten billion dollar figure itself. [3]

What the exclusivity clause did next

Atlas interpretation: The 2019 round bought OpenAI its compute and Azure its first frontier-model tenant. This round extended that arrangement past ChatGPT's launch two months earlier, at a point where OpenAI's usage and compute needs had grown well beyond what the earlier rounds anticipated. [1]

Reporting at the time also noted OpenAI's revenue was projected at a fraction of the amounts already committed to it, underscoring that the deal funded compute and research ahead of OpenAI's own commercial traction rather than in response to it. [3]