Europe · stealth · AI
Igor Babuschkin left xAI in August 2025 and now raises up to $1B for River AI at a $5B valuation on an April 2026 Nevada filing that lists no product or hires.
Igor Babuschkin founded River AI in April 2026 to build an API that lets teams train and own custom AI models with reinforcement learning. He seeks up to $1B at a $5B valuation after co-founding xAI and contributing to its Grok model.