OpenAI's Fidji Simo steps down as AGI chief due to chronic illness

Simo's transition from full-time AGI chief to part-time advisor marks the latest in a series of leadership changes that began in April when she announced her neuroimmune condition required medical leave. During that absence, the company reorganized its executive structure, with Greg Brockman stepping into product leadership and other executives—including COO Brad Lightcap and CMO Kate Rouch—adjusting their roles. Brockman's mandate, articulated in a May reorganization memo, centers on consolidating the company's agentic platform strategy by merging ChatGPT and Codex into a single unified experience, suggesting that OpenAI has been prioritizing product integration even as leadership continuity shifted.

Simo's decision to move to a part-time role reflects the reality that her recovery, as she noted on X, has proven "much longer and more complex" than she expected when taking the AGI chief role. Her departure preserves her connection to OpenAI while acknowledging that full-time duties are incompatible with managing a disabling illness. The broader pattern of executives stepping back—whether for health, special projects, or scope narrowing—indicates that OpenAI's leadership has been in flux throughout the period, though the company has maintained strategic continuity through Brockman's expanded product authority.