Chen Guangyu, 17, leaves Moonshot AI: what we know

A 17-year-old researcher who helped write the paper behind Moonshot AI's Kimi K3 model has left the company. Chen Guangyu confirmed his departure on 18 October, according to a report from Seoul Economic Daily.

Chen was one of three first authors of "Attention Residuals", the research paper behind Kimi K3. The three share equal credit for the work. Moonshot AI is the company that makes the Kimi family of AI models.

Chen confirmed to the outlet that he has left Moonshot AI. He is relocating to the San Francisco Bay Area.

There has been talk about whether he would join Anthropic, the company that makes Claude. Chen has ruled that out. He said joining Anthropic "is not happening," according to the report.

Where he will work next has not been confirmed.

This article draws on a secondary summary of the Seoul Economic Daily report, not the full original article, so some detail may be missing.

For people who use Kimi or other AI tools, the notes do not say that anything changes. There is no information about whether his departure affects Kimi K3, future Moonshot AI models or any products you might use.

What is known is limited to the person: he wrote a key paper, he has left the company, and he is moving to California. His next employer has not been named, and nothing in the report says he has taken a new job.

Chen's next move is the open question. He has said he will not be joining Anthropic, but he has not said where he is going, and the report does not name a new employer. Moonshot AI's own response is not covered in the material available here.