Hi! I’m Haoxing. I am a proud effective altruist working in AI. I currently work on predicting the weather with AI at WindBorne, where I also get to play with balloons. Previously, I worked on evaluating large language models for dangerous capabilities at METR, where we poked at the first AI agents before the term “AI agent” was invented. I also did some research on neural network interpretability at Redwood Research.

Before getting into AI I studied theoretical physics. At Berkeley, I did research in the intersection of machine learning and physics in the amazing Nachman group. Prior to Berkeley, I was fortunate to be part of the Perimeter Scholars International program, and had the privilege of spending the best college years possible at Harvey Mudd College.

When I’m not thinking about technical topics, I like to read, play video games, make music, fly my paraglider, and make very slow progress hiking the Bay Area Ridge Trail.

I am the happiest wife to Kasey Markel, and we live in the San Francisco Bay Area. We have signed the 10% pledge 🔸. If you are reading this, please consider doing the same!

In a past life, I thought a lot about the foundations of quantum theory. Although I’m no longer pursuing a career in quantum foundations, I remain passionate about the field, and think that many important, recent ideas in quantum foundations are not being effectively communicated to a wider audience. I hope the essays below help bridge that gap just a little. I also hope that my younger self from undergraduate years would have been inspired if she were to stumble upon these.

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Last updated: Jan 1, 2026