AI NewsxAI Co-Founder Igor Babuschkin’s Startup River AI Raises $1.1 Bn to Build Custom AI Models

xAI Co-Founder Igor Babuschkin’s Startup River AI Raises $1.1 Bn to Build Custom AI Models

9:18 PM IST · August 11, 2026

River’s API lets enterprises fine-tune and run reinforcement learning on open-weight models without building or managing their own AI infrastructure.