xAI Co-Founder’s River AI Raises $1.1 Billion to Let Enterprises Train Models They Own
River AI, founded by xAI co-founder Igor Babuschkin, raised $1.1 billion with backing from General Catalyst, Nvidia, AMD Ventures and others to build enterprise infrastructure for customizable, customer-owned AI models.
Why it matters: Enterprise AI is moving toward model ownership, customization and cost control, creating infrastructure demand beyond closed-model APIs.
River AI has raised $1.1 billion to expand infrastructure for enterprise customers that want to train, customize and retain model weights. The company, founded by xAI co-founder Igor Babuschkin, supports fine-tuning and reinforcement learning across large open models. Strategic participation from Nvidia and AMD Ventures places River at the intersection of open-weight AI, enterprise model ownership and compute economics. River has not disclosed a valuation, so the financing should be evaluated on product adoption and execution rather than an implied market value.