A leading e-commerce executive will soon head OpenAI's applications business.

Instacart CEO Fidji Simo, 39, announced on Wednesday in a LinkedIn post that she is leaving the grocery delivery service to join OpenAI as CEO of Applications later this year. In the new role, she will lead OpenAI's products, including ChatGPT, and report directly to CEO Sam Altman, 40.

Simo wrote that she will remain CEO of Instacart "for a couple of months" to ensure a smooth transition. Even after she leaves, she will remain the chair of Instacart's board.

"Let me start by saying this was an incredibly hard decision because I love this company," Simo wrote in the LinkedIn post, which was a copy of a message she sent to the Instacart team.

Related: 'Our Mission Remains the Same': OpenAI Reverses Course, Says Its Nonprofit Will Remain in Control of the Business

Simo wrote that her "passion for AI" and "the potential it has to cure diseases"........

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