OpenAI has closed a $40 billion private funding round, a deal the company described as one of the largest private funding rounds in history. The round values OpenAI at $300 billion post-money and brings together several familiar backers as the company looks to expand its AI research and infrastructure.
SoftBank led the financing, according to CNBC. Other participants included Microsoft, Coatue, Altimeter, and Thrive, all of which had already backed OpenAI.
The Deal Signals How Expensive AI Scale Has Become
The headline number is the clearest signal: OpenAI raised $40 billion in a single private round. The company said the financing values it at $300 billion post-money, placing the new investment in the context of an AI market where compute, products, and research ambitions are increasingly linked.
OpenAI framed the funding around three connected priorities: pushing AI research further, scaling compute infrastructure, and delivering more capable tools to ChatGPT users. The company said ChatGPT is used by 500 million people every week.
That user figure matters because it explains why infrastructure is central to the story. A widely used AI product depends not only on model development, but also on the systems needed to run those tools at large scale. In OpenAI’s own framing, the capital is meant to support both the frontier research side of the company and the operational capacity behind its products.
SoftBank Takes The Lead Alongside Existing Backers
CNBC reported that SoftBank led the round. OpenAI also named Microsoft, Coatue, Altimeter, and Thrive among the participants. The source article notes that those firms are earlier backers, meaning the financing includes investors already tied to OpenAI’s growth.
OpenAI said it is working in partnership with SoftBank Group and pointed to SoftBank’s experience scaling transformative technology. The company’s statement presents SoftBank not just as a source of capital, but as a partner for the next stage of expansion.
The investor list also shows continuity. Rather than a round made up only of new participants, the financing includes companies and firms that were already connected to OpenAI. That matters because the company’s next phase appears to require long-term support across research, infrastructure, and product distribution.
Stargate Puts Data Centers In Focus
CNBC, citing a source familiar with the matter, said around $18 billion of the funding will go toward OpenAI’s Stargate infrastructure project. The project aims to establish a network of AI data centers around the U.S.
That detail makes the funding round about more than valuation. It connects the capital directly to physical infrastructure. AI systems require large-scale compute capacity, and the Stargate project, as described in the source, is intended to support that need through a network of data centers.
For readers following the AI sector, this is the practical takeaway: the competition is not only about models or applications. It is also about the infrastructure needed to build, train, and operate AI tools for a large user base.
What This Means For OpenAI’s Next Phase
The funding gives OpenAI more room to pursue several goals at once. Based on the company’s statement, those goals include deeper AI research, expanded compute infrastructure, and stronger tools for ChatGPT’s weekly users.
The round also reinforces how closely AI product growth and infrastructure investment now sit together. A tool used weekly by 500 million people creates demand for reliable capacity. At the same time, further research may require additional compute resources before new capabilities can reach users.
The key points from the announcement are straightforward:
- OpenAI raised $40 billion.
- The round values the company at $300 billion post-money.
- SoftBank led the financing, according to CNBC.
- Microsoft, Coatue, Altimeter, and Thrive also participated.
- CNBC reported that around $18 billion will go toward Stargate.
- Stargate aims to build a network of AI data centers around the U.S.
OpenAI’s announcement turns a major private funding round into a broader statement about the future of AI scale. The company is positioning capital, compute, research, and ChatGPT usage as parts of the same expansion plan.
The result is a funding story with a clear center of gravity: infrastructure. The $40 billion round may be notable for its size, but its deeper importance lies in what OpenAI says the money will support and what CNBC reports will be directed toward Stargate.