Startup River AI, founded by xAI co-founder Igor Babuschkin, said on ‌Tuesday it has raised $1.1 billion, looking to ‌expand tools that help clients build personalized AI models on ​their own data. The fundraise was led by General Catalyst and AMP PBC, with strategic investment from Nvidia and AMD Ventures. Additional investors included Y Combinator ‌and Temasek.