In September, Cognition, a buzzy vibe-coding startup, announced it had raised $400 million, vaulting its worth to $10.2 billion. The new valuation enriched the startup’s three young founders, making them the latest to strike gold amid the generative AI frenzy. The influx of cash appears to have made one of the founders, CTO Steven Hao, a billionaire, according to financial documents viewed by Forbes.