Meet the executive with Silicon Valley's trickiest job

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OpenAI has built one of the most popular products in the world. Now it has to figure out how to pay for it.

Enter Fidji Simo.

Simo, the 40-year-old former Instacart CEO and longtime Meta executive, became OpenAI's product boss in August under CEO Sam Altman. While Altman has long been the face of OpenAI, Simo is increasingly shaping how the company operates and makes money.

"Part of bringing me on, and giving me the responsibilities of a CEO...