Prime Intellect, a startup building infrastructure for AI agents, just snagged a massive $130 million Series A, catapulting it to a $1 billion valuation. The round was led by Radical Ventures with backing from Nvidia, Intel, and Dell, plus a roster of founder angels from companies like Perplexity and Box. Launched in 2024, Prime Intellect helps companies train their own AI agents without relying on big labs like OpenAI or Anthropic. Thanks to recent advances in reinforcement learning, businesses can now fine-tune models for specific tasks—but the tech is still too complex for most to build from scratch. Prime Intellect offers a kind of “one-stop shop” for compute, training, and evaluation tools, letting customers pick and choose what they need. The strategy is working fast: with clients like Ramp, Zapier, and Flapping Airplanes, the startup has already hit a $100 million annualized revenue run rate. Why it matters: This signals a major shift as companies prioritize controlling their data and reducing dependency on frontier AI labs, betting on an open infrastructure approach that could reshape how enterprise AI gets built.