(Bloomberg) -- OpenAI executive Brad Lightcap is leaving the artificial intelligence company to start a new project, months after he stepped away from his role as chief operating officer. Most Read from Bloomberg"Over the last few months, I've been focused on the next horizon," Lightcap wrote in a note shared with OpenAI employees. Lightcap joined OpenAI in 2018 and played a key role in building up its enterprise business. Since then, he had been leading special projects and reporting directly to Chief Executive Officer Sam Altman, Bloomberg News previously reported. Most Read from Bloomberg Businessweek©2026 Bloomberg L.P.