Fidji Simo Steps Down as Head of OpenAI's AGI Unit Due to Illness

On July 9, 2026, Fidji Simo left her full-time role as head of OpenAI's AGI unit and became a part-time advisor because of health problems. In April, shortly after her appointment to the new post, she announced a medical leave related to a neuroimmune condition.

What happened at OpenAI

OpenAI confirmed the personnel changes in its AGI unit after Simo's statement on X. She no longer leads the unit full-time, but will continue working with the company as an advisor. The arrangement lets Simo stay connected to OpenAI's projects while reducing her workload.

• Fidji Simo announced her move to an advisory role on July 9, 2026
• In April 2026, she took medical leave
• Simo cited a neuroimmune condition as the reason for the leave
• Before leading the AGI unit, Simo was CEO of Applications at OpenAI

Simo got the job of leading the AGI unit shortly before her medical leave. At OpenAI, she was responsible for work on artificial general intelligence, which is meant to handle a wide range of tasks at or above human level.

Who else has left the leadership

Simo's move to part-time work is not the first notable change in OpenAI's leadership over this period. Chief Operating Officer Brad Lightcap has also left his post to focus on "special projects" inside the company.

OpenAI's Chief Marketing Officer, Kate Rouch, stepped away from her position for health reasons. She had planned to return to the company in a narrower role after recovering. Several OpenAI executives have thus changed roles, though the reasons and form of those changes differ.

"Part-time advisor" is how

Simo described her new role at OpenAI.

Simo previously ran OpenAI's applications business, the divisions responsible for the company's consumer-facing services. Her move to the AGI unit reflected OpenAI's attempt to separate long-term research from the development of mass-market products. Now the AGI unit is once again without a permanent head publicly announced by the company.

What this means

For OpenAI, Simo's departure from a leadership post is another reshuffle in top management during a period of intensive AGI work. She is not cutting ties with the company entirely, though: the advisor role keeps open her participation in key projects without the constant workload she had before.