OpenAI just got a much bigger war chest. Days after closing a massive $6.6 billion funding round that valued the company at $157 billion, the AI lab has now secured a $4 billion revolving credit facility. The lending syndicate reads like a Wall Street roll call: JPMorgan Chase, Citi, Goldman Sachs, Morgan Stanley, Santander, Wells Fargo, SMBC, UBS, and HSBC are all in.

It’s an undrawn facility at closing, meaning the money is a backstop, not immediate cash in the bank. But combined with the fresh equity, it pushes OpenAI’s total liquidity above $10 billion. For a company that reportedly burns through billions annually training frontier models, that kind of runway isn’t just comfortable—it’s a competitive moat. Smaller rivals simply cannot match it.

Sarah Friar, OpenAI’s CFO, framed the move as a balance sheet power play. “This credit facility further strengthens our balance sheet and provides flexibility to seize future growth opportunities,” she said. She also noted a neat bit of synergy: many of the banks writing the checks are also OpenAI customers. It’s a tidy arrangement—the people financing your growth are also buying your product.

The $10 billion figure underscores just how capital-intensive the AI race has become. Compute isn’t cheap, and talent is even more expensive. OpenAI is clear about where this goes: infrastructure to meet surging demand, more research, and aggressive hiring. The question nobody’s asking out loud is what happens when the bill comes due. For now, though, OpenAI has the kind of financial firepower that lets you ignore that question for a very long time.