OpenAI has successfully raised $40 billion in one of the largest private funding rounds ever, bringing its post-money valuation to $300 billion. The funding was led by SoftBank, with notable contributions from Microsoft, Coatue, Altimeter, and Thrive. This investment will help advance AI research and expand OpenAI's compute infrastructure. A significant portion, approximately $18 billion, is earmarked for the Stargate infrastructure project, which aims to develop a network of AI data centers across the U.S. OpenAI emphasizes its commitment to enhancing AI tools for its 500 million users weekly.