Jimmy Ba Exits xAI: Second Co-Founder Departure from Elon Musk’s Startup in 48 Hours
xAI co-founder Jimmy Ba has announced his departure from the company, expressing gratitude towards Elon Musk and pride in his team. His exit comes just two days after another co-founder, Tony Wu, left the organization. Ba’s departure marks a significant shift within xAI, as he becomes the sixth co-founder to exit from the original twelve-member team, raising questions about the future direction of the company.
Jimmy Ba’s Journey at xAI
Jimmy Ba is a prominent figure in the field of machine learning and an associate professor of computer science at the University of Toronto. He completed his PhD under the guidance of Geoffrey Hinton in 2018. Ba joined Elon Musk and a group of researchers to co-found xAI in July 2023, aiming to advance humanity’s technological capabilities. In his farewell tweet, Ba reflected on his time at xAI, stating, “Last day at xAI. xAI’s mission is to push humanity up the Kardashev tech tree.” He expressed his appreciation for the journey and the teamwork that defined his experience at the company. Ba emphasized the importance of the relationships he built, noting that “the people and camaraderie are the real treasures at this place.” His departure signals a recalibration in his career, as he looks forward to a future filled with potential advancements in productivity and technology.
Reactions from the Community
Ba’s announcement has sparked a wave of reactions on social media platform X, with many expressing curiosity about the recent departures of co-founders from xAI. Some employees took the opportunity to share their admiration for Ba, highlighting his leadership and contributions to the team. Comments ranged from inquiries about the company’s stability to heartfelt messages of gratitude. One user remarked, “Hard to imagine xAI without you. Thank you for being the most inspiring leader and for bringing us to where we are today.” Another expressed their appreciation, stating, “Your contributions to xAI will be forever remembered.” The outpouring of support reflects the impact Ba had on his colleagues and the company’s culture.
Co-Founder Exodus at xAI
Ba’s departure is part of a larger trend at xAI, where six out of the twelve original co-founders have now left the company. The exodus began in 2024 when infrastructure lead Kyle Kosic departed to join OpenAI. This was followed by Christian Szegedy, who had a long tenure at Google before joining xAI, announcing his exit in 2025. Other notable departures include Igor Babuschkin, who left to start a venture firm, and Greg Yang, who cited health issues as his reason for leaving in January 2026. The most recent departure before Ba’s was Tony Wu, who announced his exit to pursue the “next chapter” of his life. This trend raises questions about the internal dynamics at xAI and what the future holds for the remaining team members as they navigate these changes.
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