OpenAI's No. 2 quits, leaving CEO to scramble for successor
Fidji Simo, OpenAI's chief of applications and de‑facto No. 2, is leaving her full‑time role after a prolonged medical leave, shifting to a part‑time advisory position. Her departure creates a leadership vacuum just as OpenAI eyes a possible IPO and tries to outpace Anthropic in the enterprise market.