Shiyang Chen

Used Grok Build to build the infra that built Grok Build

@archanfel_anoth 🫡

I left xAI earlier this year after two incredible years. I joined still early in my career, and had the privilege of meeting many great people and friends along the way. Over time, I ended up leading pretraining across architecture, training, and parts of infra, and later led major RL runs for Coding. Together, we pushed forward generation after generation without missing a beat. None of this would have been possible without the fantastic team. Grateful for my team and friends —their talent and dedication made this possible. Working through hard problems together was the most rewarding part of the journey, and I’ll miss it deeply. It’s hard to walk away from people you’ve spent years building with. But I’m proud of everything we built together, and ready for the next chapter.

@hsu_byron @xai @periodiclabs 🐐

After 1 year at @xai, I'm joining @periodiclabs to build the RL system for atoms. xAI was a once-in-a-lifetime experience: building the inference stack at megascale from zero, countless late-night debugging sessions, endless memes and Slackmojis with the team. I'm deeply grateful for the trust xAI leaders (@lm_zheng @ying11231 @Guodzh @makro_ai) placed in me, and for the incredible people I got to build alongside. AGI really is the friends we made along the way. Digital AI has come incredibly far, and I have no doubt physical AI will go through the same revolution, starting from the fundamentals: atoms and labs. Born and raised in Taiwan, I deeply understand how transformative materials are to technology — and how much is still left to explore. Periodic Labs has an unmatched combination of elite scientists and research engineers, tackling one of the most ambitious problems out there. I'll be focused on building the world's first and best RL system for atoms. So excited to work with @LiamFedus @ekindogus @AnjneyMidha to build a better future for humanity! Bonus: we'll be building on a lot of open source technology and contributing back generously — feels incredible to be back in the OSS community again.

@HeinrichKuttler @xai @elonmusk F 🫡

Update on the below: 9 months later we're expecting our third child any day now. I decided to focus on my family for a while. Leading Supercomputing at @xai will remain the honor of my life. Thank you @elonmusk for the opportunity. We will win.