Fidji Simo, who formerly held the position of chief executive overseeing AGI deployment at OpenAI, is stepping down from her full-time role and will now serve as a part-time advisor. This shift follows her recent medical leave, which was prompted by a deterioration in her neuroimmune condition.
In a message shared on X, Simo explained, “Just three months ago, I had to take medical leave due to a severe worsening of a chronic illness that I have battled for the past seven years. During my time away, it became apparent that my recovery journey would be more prolonged and intricate than I had anticipated, and I needed to devote my attention entirely to it.”
Simo joined the OpenAI board of directors in March 2024 and was subsequently hired by CEO Sam Altman the following year to lead the product and business divisions, allowing Altman to concentrate on research and the company's data center expansion. Before her tenure at OpenAI, Simo served as the CEO of Instacart and led the Facebook application at Meta.
Shortly before her arrival at OpenAI, Simo faced a serious health setback, having been diagnosed with postural tachycardia syndrome (POTS) in 2019. In an April memo to OpenAI staff announcing her leave, she stated, “Throughout my time here, I’ve been postponing medical tests and new treatments to maintain my focus on work and not miss a day. It’s become evident that I've overextended myself, and it's crucial for me to explore new treatment options to help stabilize my health.”
Simo's medical leave coincided with a significant executive restructuring at OpenAI, which saw Brad Lightcap, the former COO, transition to a role managing special projects. Meanwhile, cofounder and president Greg Brockman stepped in to oversee OpenAI’s product strategy. In the period following Simo’s departure, the company has further reorganized its product teams, appointing Thibault Sottiaux as the head of core products, including ChatGPT.
As OpenAI prepares for a planned IPO in 2027, it aims to streamline its focus on a core set of products, targeting a valuation of $1 trillion. To this end, the company has integrated teams working on ChatGPT, its AI-enhanced browser, and coding agent to create a unified “superapp.” Additionally, OpenAI has discontinued several less central projects, including Sora.
On the same day Simo's updates were announced, OpenAI introduced its most significant update to ChatGPT since its initial launch. This update features a new AI agent in ChatGPT capable of acting on behalf of users, such as moving local files and writing code, accompanied by a redesign of the desktop application. With this enhancement, OpenAI aims to provide ChatGPT users with functionalities that were previously exclusive to Codex, enabling them to generate custom software projects utilizing AI.



