Monday night, xAI co-founder Yuhuai (Tony) Wu announced he was leaving the company. He wrote that it was time for his next chapter, stating that a small team armed with AIs can move mountains and redefine what is possible.
Less than a day later, on Tuesday afternoon, fellow xAI co-founder Jimmy Ba, who reported directly to Elon Musk, also announced his departure. He posted a gracious note thanking Musk for the incredible journey and expressing pride in the team.
On their own, these are standard tech departure announcements. However, they are part of a troubling pattern for the lab. Six members of the company’s original 12-person founding team have now left, with five of those departures occurring in just the last year. Infrastructure lead Kyle Kosic left for OpenAI in mid-2024. Google veteran Christian Szegedy departed in February 2025. Co-founder Igor Babuschkin left this past August to found a venture firm, and Microsoft alum Greg Yang cited health issues when he departed just last month.
By all accounts, the splits have been amicable. There are many reasons why, nearly three years in, founders might move on. Elon Musk is a notoriously demanding boss. With SpaceX’s acquisition of xAI complete and an IPO pending in the coming months, those involved have a significant windfall coming. It is also a great time to be fundraising for an AI startup, making it natural for high-level researchers to strike out on their own.
There are also less amicable reasons that might factor in. The company’s flagship product, the Grok chatbot, has struggled with bizarre behavior and apparent internal tampering, which could easily create friction on the technical team. Then there were recent changes to xAI’s image-generation tools that flooded the platform with deepfake pornography, sparking slow-moving but real legal consequences.
Whatever the cause, the cumulative impact is alarming. There is a lot of work left to do at xAI, and an IPO will bring more scrutiny than the lab has ever faced before. With Musk already spinning up plans for orbital data centers, the pressure to deliver will be intense. The pace of model development is not slowing down, and if Grok cannot keep pace with the latest models from OpenAI and Anthropic, the IPO could easily suffer.
In short, the stakes are high, and xAI needs to hold on to all the AI talent it can.