Jimmy Ba, a co-founder of Elon Musk’s xAI who led research, security, and enterprise efforts at the start-up, has become the sixth member of its founding team to depart — and the second in roughly 24 hours. Ba confirmed his exit in a post on X after the Financial Times contacted him about his planned departure, thanking Musk and saying he would “remain close as a friend of the team.”
His move came a day after Tony Wu, who led xAI’s reasoning team, became the fifth founder to leave the twelve-person group that launched the company in 2023. More than a half-dozen other researchers have also left in recent weeks, according to social media posts and people familiar with the matter — a significant toll on a deliberately small technical team. Musk reportedly met with employees to discuss changes to the company’s technical leadership.
A Founding Team Cut in Half
The two exits mean roughly half of xAI’s original co-founders have now departed. Kyle Kosic left in 2024, and Igor Babuschkin — one of the company’s most prominent researchers — departed in 2025 to launch his own venture fund, alongside co-founder Christian Szegedy. Co-founder Greg Yang also announced he was stepping back after a Lyme disease diagnosis. For a company that has marketed itself on the density of its research talent, the founding bench has thinned quickly.
The churn extends well beyond the founders. Over the past year xAI has lost general counsel Robert Keele, chief financial officer Mike Liberatore, and head of product engineering Haofei Wang, while Linda Yaccarino stepped down as chief executive of X in July 2025 without a replacement. New financial leadership has arrived in their place: former Morgan Stanley banker Anthony Armstrong was named chief financial officer, and Jonathan Shulkin, previously a partner at xAI investor Valor Equity Partners, became chief revenue officer.
Pressure Over Ambitious Targets
According to people familiar with the company, some employees have complained that xAI’s leadership has over-promised to Musk on what its technology can deliver — and has then had to answer for the gap. Musk has set exceptionally aggressive goals for Macrohard, the company’s project to build AI agents capable of doing anything a human can do with a computer, telling one interviewer he would be surprised if digital human simulation were not solved within the year.
The coding and agent products developed under that banner compete directly with entrenched tools such as OpenAI’s Codex and Anthropic’s Claude Code, and have reportedly fallen short of Musk’s expectations. The company’s AI “companions,” including the anime character Ani, have likewise not delivered the user engagement Musk hoped for, despite new characters and additional resources. Musk is said to be reviewing leadership performance and restructuring departments he believes are underperforming, while co-founder and former Google DeepMind engineer Manuel Kroiss has been promoted to help run coding operations.
The SpaceX Merger Backdrop
The departures landed days after one of the most consequential corporate moves in the industry: SpaceX’s all-stock acquisition of xAI, announced in early February 2026, which valued the AI start-up at $250 billion and the combined company at over $1 trillion. The deal reflects Musk’s plan to build a network of data-center satellites capable of running advanced AI models in orbit — an idea that ties xAI’s compute ambitions to SpaceX’s launch capacity.
Reporting since the merger, including by CNBC and TechCrunch, has described tension between xAI’s research-lab origins and the operational intensity of the SpaceX integration — a cultural clash several of the departures have been linked to.
Why the Exodus Matters
Founder departures are common at maturing start-ups, but the pattern here is unusual in speed and concentration. xAI has raised capital at extraordinary valuations on the premise that a small, elite team could out-execute larger labs; each senior exit tests that premise. The company also faces the same commercial question as its rivals — whether frontier models can be turned into products people pay for and keep using — at the same time as it absorbs a merger of unprecedented scale. How xAI backfills its research leadership, and whether Macrohard ships products that match Musk’s public claims, will say more about its trajectory than any single resignation. The market context for those AI product bets is explored in this related piece on how AI announcements are moving markets.
Limitations and What to Watch
Much of the reporting on xAI’s internal dynamics rests on unnamed sources and has not been confirmed by the company, and departure counts vary slightly between outlets depending on who is counted as a co-founder and when. Valuations attached to the SpaceX transaction are based on the companies’ own stock terms rather than public-market prices. Readers should watch three things: whether further co-founders exit, whether the promised orbital data-center architecture moves from concept toward deployment, and whether xAI’s consumer and coding products show measurable traction rather than announced ambition.
