AI Startup Lambda Raises $4B to Power ChatGPT Rivals

Lambda, a cloud provider for AI, is raising up to $4 billion at a $14.5 billion pre-money valuation — potentially its last private round before a planned 2027 IPO, according to The Wall Street Journal, with Coatue Management and Blackstone leading. A letter to investors reviewed by the Journal shows Lambda's backlog grew from $15 billion in June to $50 billion in September, but much of that increase appears driven by a $35 billion commitment from one company: Anthropic, which signed a deal with Lambda in late August.

That means Lambda's valuation could be leaning heavily on Anthropic's ability to keep paying. Still, with reliable GPU capacity so scarce, investors are clearly willing to bet on companies that provide it, especially ones with large contracts with a major AI lab.

For neoclouds like Lambda, demand isn't the problem so much as the cost of meeting it: data center buildouts are largely funded by debt — Lambda raised an additional $1 billion last week — and lenders are getting choosier. If and when Lambda IPOs, it will join other Nvidia-backed neoclouds like CoreWeave and Nebius that depend on their stock to fund data center buildouts. Lambda, Coatue, and Blackstone did not immediately respond to a request for comment.