OpenAI's leadership is undergoing a major shake-up, with multiple executives departing in 2026. Key leavers include Denise Dresser, Brad Lightcap, and Fidji Simo. Concurrently, the company's safety and ethics teams are also being restructured.
The revolving door of OpenAI executives continues to spin. The ChatGPT developer lost several top leaders in 2026, including former Chief Operating Officer Brad Lightcap, Consumer Business CEO Fidji Simo, and Chief Revenue Officer Denise Dresser, along with heads of marketing, enterprise products, research, safety, and ethics. Some departing executives have left to start new companies, while others have stepped back due to health reasons. This wave of departures follows a similar pattern in 2025, when OpenAI lost its Chief People Officer, Chief Communications Officer, a top researcher who left to found an AI research startup, and at least seven researchers who were poached by Meta. Below is a list of the core executives who left OpenAI in 2026.
Denise Dresser - OpenAI announced in August that Chief Revenue Officer Denise Dresser would be leaving. She had held the position since December 2025. The company stated in a blog post, "Denise will transition from OpenAI to pursue new opportunities. During the transition, she will work closely with the business team to continue serving our customers." Dali Rajic will succeed her as Chief Revenue Officer.
Brad Lightcap - Lightcap, who joined OpenAI in 2018, announced his departure on social media platform X in August. He told his followers he was leaving to "start a new venture." "For the past few months, I've been thinking about long-term goals and what obstacles might hinder our mission. As we enter the next phase, there are several critical things the world needs to address," Lightcap wrote on X. "I'll share more details later. I'm more optimistic about OpenAI than ever, and I look forward to advancing the AI mission from a new perspective." Lightcap initially served as OpenAI's Chief Financial Officer before moving to Chief Operating Officer in 2022. In April of this year, OpenAI announced he would transition to a role as Special Projects Lead.
Fidji Simo - Simo announced in July she would step down as CEO of the Consumer Business to become a part-time advisor. Diagnosed with Postural Orthostatic Tachycardia Syndrome (POTS) in 2019, she began a medical leave of absence in April this year. "The past seven years have been a blur of hospital visits, enduring symptoms, navigating treatments, dealing with insurance, and the invisible burdens of living with a chronic illness," Simo wrote on X in July. "Like millions of others with chronic conditions, I’ve learned that even with resources, managing healthcare is incredibly difficult." Simo had taken on the role of CEO of the Consumer Business in May 2025.
Kevin Weil - Weil announced his departure on X in April. "These two years have been incredibly productive. I started as Chief Product Officer, then joined the research team to launch the OpenAI for Science project," he said. Weil joined OpenAI in 2024 as Chief Product Officer and became Vice President of OpenAI for Science in October 2025, a project aimed at building an AI research platform to accelerate scientific discovery. After leaving, Weil founded an AI research startup with a target valuation of at least $750 million.
Bill Peebles - Peebles, who spent three years at OpenAI, left in April 2026. He had been the lead on the text-to-video model Sora project. "The original Sora ignited a wave of investment in video generation AI across the industry, but it was the release of the second-generation model, Sora 2, that truly showed the power of this transformation," Peebles said on X. "I'm incredibly proud of the team's countless sleepless nights, before and after the product launch, to responsibly deploy this technology and guide society's understanding." The video generation model was made available to users in December 2024; nine months later, OpenAI released Sora 2 and a standalone app to rival social platforms. Despite initial hype, user traffic quickly declined. OpenAI shut down Sora and its accompanying app in April of this year.
Srinivas Narayanan - Narayanan, who served as CTO of Business Applications for three years, announced his departure in April. "It was a tremendous honor to lead the B2B engineering team," he wrote on LinkedIn. "With the recent and upcoming launches of several products, this feels like the right time to move on." He plans to return to India to spend time with his parents before deciding on his next steps. Narayanan joined OpenAI as a Vice President of Engineering, leading the development of ChatGPT and enterprise-grade products.
Kate Rouch - Rouch stepped down as Chief Marketing Officer in April to focus on rest and recovery from breast cancer treatment. A former Meta executive of over a decade, where she served as Global Head of Brand and Product Marketing, she joined OpenAI in December 2024. After undergoing treatment and a medical leave of absence in 2025, she had returned to work. OpenAI has stated that Rouch may return in a more limited role once her health permits, and the company is currently searching for a new Chief Marketing Officer.
Barret Zoph - Zoph left in June, just five months after returning to OpenAI to lead enterprise AI sales. He originally left OpenAI in September 2024 to co-found Thinking Machines Lab with former OpenAI CTO Mira Murati. He left that competing company and returned to OpenAI in January 2026. OpenAI has not publicly disclosed the specific reasons for his departure this time.
Chloé Bakalar - Ethics Lead Bakalar left in July, having been with the company for less than a year. Before joining OpenAI in August 2025, she spent six years at Meta working on responsible AI. During her tenure, she focused on studying model behavior, the relationship between humans and AI, and whether advanced AI systems should be granted moral consideration.
Johannes Heidecke - Heidecke, who led OpenAI's Safety Systems team, left in July amid a restructuring of the company's safety division. He joined OpenAI in 2021 and took charge of the Safety Systems team in 2024, responsible for assessing models' potentially dangerous capabilities and building safeguards to prevent harmful AI outputs. After Heidecke's departure, all safety teams were placed under the unified leadership of Mia Glaese, Vice President of Research and Safety.
Joshua Achiam - Chief Futurist Achiam left in July after nearly nine years at OpenAI. He previously led the Alignment team, whose core mission was to realize the company's founding goal: ensuring that artificial general intelligence benefits all of humanity. After OpenAI disbanded the Alignment team in early 2026, Achiam was reassigned to the role of Chief Futurist.
Caitlin Kalinowski - Head of Robotics and Consumer Hardware Kalinowski resigned in March, citing disagreements with OpenAI's partnership agreement with the U.S. Department of Defense. "Issues like domestic surveillance without judicial oversight and lethal autonomous weapons without human authorization were rushed through without adequate discussion," Kalinowski wrote on LinkedIn. She added that her primary concern was governance, noting that the security safeguards related to the agreement were not fully in place when it was announced. Before joining OpenAI in November 2024, Kalinowski led AR hardware projects, including the Orion smart glasses, at Meta. OpenAI has officially stated that the partnership agreement with the Department of Defense explicitly prohibits domestic surveillance and the development of autonomous lethal weapons.