Coverage: How Amazon’s $50B deal for OpenAI really works, and what they’re keeping secret
Amazon’s OpenAI investment and cloud partnership made big headlines Friday, but the mechanics of the deal — including how money flows, what triggers payments, and what happens if things go sideways — are buried in SEC filings that tell a complicated story.
Here’s how it works, what the documents say, and what they’re still keeping an eye on.
Money: Amazon is investing up to $50 billion in OpenAI, in two phases.
- $15 billion in OpenAI Series C Preferred Stock, due March 31.
- The $35 billion commitment comes later, and the timing depends on a series of competitors. (The filing puts the exact amount at $34,999,999,447.98. The share price didn’t split evenly at $35 billion, leaving it short $552.02. Every cent counts!)
It’s part of a larger funding round: OpenAI has raised $110 billion at a valuation of $730 million, with SoftBank and Nvidia contributing $30 billion and $50 billion respectively. OpenAI said more investors are expected to join as the round continues.
Microsoft, the largest investor in OpenAI, has not yet participated in this round. CNBC reported that Microsoft still has an option to join. Microsoft and OpenAI released a joint statement saying their partnership remains intact. (More on that below.)
Microsoft, however, invested $5 billion in Anthropic last year, so with the latest deals, both giants from the Seattle area now own shares in the creators of Claude and ChatGPT.
Causes: Amazon can buy back its remaining shares whenever it wants, at its discretion, according to the filing. But two events can force their hand, requiring more investment.
- A “Mandatory Funding Event” that requires Amazon to purchase all outstanding shares within five business days. The file installation does not reveal the milestone. The description has been redone.
- The first public offering is OpenAI. If OpenAI notifies Amazon after filing an IPO privately with the SEC, Amazon must buy all remaining shares. It receives four weeks from the notice or five business days after the public S-1, whichever is later.
OpenAI CEO Sam Altman, speaking about the deal in a joint appearance with Amazon CEO Andy Jassy on CNBC on Friday, said OpenAI is “open to going public at the right time.”
The way of investing can also change. If Amazon buys back its remaining shares before the IPO, it gets Series C Preferred Stock. If the purchase happens after OpenAI goes public, the filing says Amazon gets common stock instead.
Expiry date: The equity commitment expires on Dec. 31, 2028. If the triggers do not occur and Amazon has not invested the full amount by then, the obligation ends.
If either party fails to meet its obligations under the equity agreement, monetary damages are limited to the amount of the unfunded liability. Each company has the right to seek a court order compelling the other to comply. Both parties waived their right to a jury trial.
Basic cloud deal: Equality is only part of the plan. On the same day, Amazon and OpenAI signed a Joint Cooperation Agreement (JCA) and a cloud services agreement, both mentioned but not included in the public books. OpenAI already has a $38 billion annual deal with AWS. This increases it by $100 billion over eight years.
The cloud services agreement includes OpenAI’s commitment to use 2 gigawatts of Trainium capacity through AWS. Gigawatts measure power draw, and serve as a proxy for the amount of computing power involved. For reference, a large nuclear power plant produces about 1 gigawatt.
Trainium is Amazon’s custom AI chip, designed as a low-cost alternative to Nvidia’s GPUs. Anthropic is already training its next version of Claude on Trainium, according to Jassy, making OpenAI the second major AI lab to commit to the chip.
Amazon and OpenAI are also jointly building a Stateful Runtime Environment, powered by OpenAI models, to run on Amazon Bedrock, AWS’s AI modeling platform. This runtime environment will allow AI agents to preserve context, remember previous work, and perform multiple systems over time. OpenAI says it will launch in the next few months.
The filing doesn’t specifically mention Amazon Alexa, but the press release says OpenAI will develop “custom models available to run Amazon’s customer-facing applications,” adding to Amazon’s Nova family of AI models.
Equity investment and cloud partnership deals are contractually linked. If the Collective Bargaining Agreement is terminated, the additional $35 billion in capital obligations die with it. But because the JCA is not public, we don’t know how it can be terminated.
OpenAI and Amazon have been talking for years: Filing a non-disclosure agreement references a deal dated May 23, 2023. That’s nearly three years before Friday’s announcement, and four months before Amazon’s $4 billion investment in Anthropic.
One possible reason they didn’t make a deal right away: Microsoft had the first right of refusal to be OpenAI’s computing provider, and OpenAI couldn’t co-create products with other people.
Those restrictions were loosened in October 2025, when Microsoft and OpenAI announced a restructured partnership agreement that included new provisions allowing OpenAI to jointly develop products with third parties and removing Microsoft’s right of first refusal on computing.
In exchange, OpenAI committed to buy an additional $250 billion in Azure services.
In their joint interview Friday, Jassy told CNBC that he and Altman had been talking “for a while” and that the OpenAI partnership was already in Amazon’s forecast when the company announced plans to spend $200 billion this year.
What is hidden: The filling has been greatly restructured. Key deal terms left out include: a milestone that would require Amazon to invest $35 billion with five business days’ notice; events that could terminate the $35 billion investment obligation; what constitutes a breach of contract; and conditions that must be satisfied before Amazon can purchase additional shares.
The Verge and others have speculated that the modified milestones may be tied to OpenAI’s achievement of general artificial intelligence, or AGI, the loosely defined threshold at which AI systems can match or exceed human-level thinking across a wide range of tasks.
An AGI clause exists in Microsoft’s OpenAI agreement. But Altman has signaled that’s not the case here. “We don’t do new deals that stop when AGI is reached,” he told CNBC.
What about Microsoft? OpenAI and Microsoft released their joint statement on Friday, accompanying the OpenAI funding news, saying that Microsoft Azure remains the exclusive cloud provider. formless OpenAI application programming interfaces.
Stateless refers to a useful but basic building block, where a request sends information, receives a response, and the connection closes. That is the opposite with a kingdom APIs, the most complex interactions that maintain context and memory across multiple interactions.
Microsoft also maintains its exclusive license for OpenAI intellectual property, which powers Copilot, Bing, and the Azure OpenAI Service. Under the existing partnership, Microsoft receives a share of OpenAI’s revenue. That provision is unchanged, and includes revenue from OpenAI’s partners and other cloud providers.
A joint Microsoft-OpenAI statement said, “Collaborations such as the partnership between OpenAI and Amazon have always been contemplated under our agreements and Microsoft is excited to see them build together.”
OpenAI’s own products, including Frontier, still run on Azure. Frontier is OpenAI’s enterprise platform for building, deploying, and managing AI agent teams.
AWS becomes Frontier’s third-party cloud distributor, meaning that businesses looking to access it through a cloud provider other than OpenAI go through Amazon. But the product itself is always hosted on Microsoft’s infrastructure.
Bottom line: The era of special AI relationships is over. Microsoft retains the core API business, intellectual property license, and revenue share. Amazon acquires Stateful Runtime Environment, Trainium workloads, and third-party Frontier distribution.
Both companies are investing in Anthropic. OpenAI is getting investment from everyone. The big players in AI aren’t just picking partners anymore, they’re playing on all sides.
