You could own the birthplace of OpenAI — if you have $1.5 million to spare. When OpenAI first launched in 2015, its founders, including Sam Altman , did not have an office and primarily worked out of cofounder Greg Brockman 's apartment in the Mission. That very loft apartment on the upper levels of 2977 21st St. in San Francisco has been listed for sale for $1,545,000 and had its first open house over the weekend. Shane Ray, the listing agent with Compass, told Business Insider that while some