The company is one of the three largest venture-backed startups ever
Why it matters: We knew OpenAI was hot, but maybe not this hot. The company has just raised a startling $6.6 billion, leading to a valuation of $157 billion. Even by Silicon Valley standards this is a lot of money. OpenAI is close-lipped about how it will invest the capital, only saying it will accelerate AI research and increase its compute capabilities.