One of OpenAI's longest serving executives is headed out the door, although the longtime COO told staff that he was "excited to help you all advance the mission from a different vantage point."

Aug 11 : Brad Lightcap, OpenAI's special projects lead, said on Tuesday he is leaving the AI startup to start a new venture.

Aug 11 : Senior OpenAI executive Brad Lightcap said on Tuesday he would leave the company to start a new venture, as the ChatGPT maker gears up to go public amid growing AI…