OpenAI CEO, Fidji Simo, is taking "several weeks" of medical leave to address a relapse of postural orthostatic tachycardia syndrome (POTS). This leaves a broader leadership reshuffling across the company, with responsibilities spread across top executives. Chief Operating Officer Brad Lightcap is moving into a new role focused on special projects, including a potential joint venture with private equity firms to distribute OpenAI's technology. Co-founder Greg Brockman will take over the product organization. Chief Marketing Officer Kate Rouch will step back to focus on cancer recovery.