Barret Zoph, who rejoined OpenAI in January 2026 after a brief departure to co-found rival AI company Thinking Machines Lab, has left the company once again, according to sources familiar with the matter. The departure comes just five months after his return, making it the second time Zoph has left the high-profile AI firm in under two years.
Zoph had been leading OpenAI's enterprise AI sales push, a critical role as the company shifts its focus toward revenue-generating products ahead of a planned IPO. In recent months, OpenAI leadership emphasized cutting down on experimental “side quests” and doubling down on core business areas like enterprise tools and coding assistants. Zoph's role was central to that strategy.
The news was confirmed by OpenAI, which acknowledged Zoph's departure. He posted a farewell message in the company's internal Slack channels. Zoph did not immediately respond to requests for comment.
Background: A Career Marked by Moves Between OpenAI and Rivals
Zoph's relationship with OpenAI has been turbulent. He originally left the company in fall 2024 to become co-founder and CTO of Thinking Machines Lab, a startup founded by former OpenAI CTO Mira Murati. Murati had briefly served as OpenAI CEO during the dramatic ouster of Sam Altman in November 2023, and after leaving OpenAI in September 2024, she took several employees with her to start Thinking Machines Lab.
However, Zoph's tenure at Thinking Machines Lab was short-lived. In January 2026, Murati announced that the company had “parted ways” with Zoph following reports of alleged misconduct involving an undisclosed relationship with a colleague. He was replaced as CTO. Just days later, Zoph returned to OpenAI alongside two other former Thinking Machines Lab employees: Luke Metz and Sam Schoenholz. OpenAI’s CEO of Applications, Fidji Simo, publicly welcomed them back, stating the decision had been in the works for several weeks.
Now, five months later, Zoph is leaving OpenAI again. The exact reasons for this departure have not been disclosed, but the pattern suggests ongoing instability both at the individual level and within the broader leadership ranks of the company.
Context: OpenAI’s Enterprise Pivot and IPO Preparations
Zoph's exit comes at a delicate time for OpenAI. The company has been aggressively reorganizing to present itself as a viable public company. In addition to cutting back on experimental projects, OpenAI has been building out its enterprise sales force, seeking to win large corporate clients for its API and custom AI models. The enterprise segment is seen as a key driver of recurring revenue and a path to profitability before any IPO.
OpenAI’s leadership has also been in flux. The company has seen high turnover in recent years, particularly among top technical and executive talent. The departure of a senior sales leader, even one with a short tenure, could raise questions about the stability of OpenAI’s go-to-market strategy. Analysts have noted that consistent leadership is critical for building long-term customer relationships, especially in the competitive enterprise AI market where rivals like Google and Anthropic are also vying for business.
Furthermore, the ongoing tensions between OpenAI and former employees like Mira Murati have created a backdrop of personal and professional friction. The November 2023 ouster of Sam Altman, followed by his reinstatement, created deep divisions within the company. Murati testified during the recent OpenAI trial that she could not always trust Altman’s statements, reflecting a lingering lack of trust among key figures. Zoph was caught in the middle of these dynamics, having worked closely with both Murati and Altman at different points.
Career Highlights and Contributions
Barret Zoph is not a household name outside AI circles, but he has been involved in several important projects. He previously worked at Google Brain and later at OpenAI, where he contributed to reinforcement learning research and large language model development. His expertise lies in making AI systems more efficient and scalable, which made him a natural fit for the enterprise sales role—translating technical capabilities into business solutions.
At Thinking Machines Lab, he was expected to help build a competing foundation model, but his abrupt departure and the misconduct allegations derailed those plans. His rapid return to OpenAI surprised many industry observers, as it seemed to signal that the company was willing to overlook past controversies to bring back talented engineers. However, the second departure suggests that the working relationship may not have been as harmonious as initially hoped.
What This Means for OpenAI
The latest departure adds to a growing list of high-profile exits from OpenAI. In the past two years, the company has lost key researchers, executives, and now a senior sales leader. While the company continues to attract top talent, the revolving door of key personnel may affect investor confidence as OpenAI moves toward its IPO. The IPO is expected to be one of the largest tech IPOs in history, but it will require a stable management team and a clear narrative about the company’s future.
OpenAI has not announced a replacement for Zoph. The enterprise sales team will report directly to interim leadership, likely the head of applications or the CEO. The company may also reorganize the role, given that Zoph’s tenure was so brief that his departure may not cause significant disruption.
In the broader context, the saga of Barret Zoph illustrates the challenges OpenAI faces in retaining talent amidst intense competition and internal turmoil. The company’s ability to hold onto key people will be a factor in its long-term success and its ability to execute on its mission of building safe and beneficial artificial general intelligence. For now, the focus remains on the immediate next steps: finding a new enterprise AI sales chief and continuing the march toward the public market.
This article has been updated to reflect additional context about the departure.
Source: The Verge News