Kuang Xu

@Stanford GSB. Ex-AI @Uber.
Suzhou--UIUC--MIT--GSB

[Kuang Xu @ProfKuangXu]

It’s a rare joy to work on something with real-world impact. Meet Chronos LTV, a system we built at Uber to estimate the causal, long-term impact of short-term delays. Links below.

This problem is notoriously difficult because of the cascading effects inherent in long-horizon learning: a single event does not just change a user’s current experience; it can also update hidden state (e.g., beliefs, preferences, habits) in ways that in turn would have lasting effects on future behaviors.

Chronos LTV combines ideas from Markov decision processes, off-policy evaluation in reinforcement learning, and causal inference. It then enables accurate long-horizon evaluation using observational data, without relying on expensive, long-running randomized controlled trials.

Beyond its immediate application here, I am optimistic that Chronos could also be useful in other long-horizon evaluation tasks in agentic AI and world models.

[Kuang Xu @ProfKuangXu]

@OriolVinyalsML @quocleix For heaven's sake pls don't take calls in Cafe Venetia

[Kuang Xu @ProfKuangXu]

@zacharylipton Fair. the PAC/Vapnik era

[Kuang Xu @ProfKuangXu]

Huge congrats to our friends @jiayq, Xiang, and Junjie at Intent Lab! Solving isolated coding tasks alone is not the same as a seamless flow from intent to software. Excited to see what the team will build in the coming months!

[Yangqing Jia @jiayq]

We are starting Intent Lab, building an autonomous team we call "fleet" that turns intent into production software. Today we are sharing some early results: the fastest GLM5.2 inference engine, one shot database creation, and a fully verified agent filesystem.

https://t.co/CtwtypE0rH

[Kuang Xu @ProfKuangXu]

POV Chinese phd students: your own coauthor praises you by coining a new "Erdos Number" but doesn't use your last name because nobody knows who's "Yang" in a "Yang Number" lol

If you are a Chinese student, do yourself a favor and start publishing under your given name (i.e., L. Fei-Fei not F. Li).

[Christopher Manning @chrmanning]

My Zhilin number is 1.

[Kuang Xu @ProfKuangXu]

Wow finally v14 Lite! Thank you @pduan @aelluswamy !!

[Kuang Xu @ProfKuangXu]

@mikepat711 Banger

[Kuang Xu @ProfKuangXu]

@ml_angelopoulos @yacineMTB 2027: Chinese in American labs distilling Chinese labs that distilled American labs run by Chinese that distilled...

[Kuang Xu @ProfKuangXu]

@ml_angelopoulos @yacineMTB 2027: Chinese in American labs distilling Chinese labs that distilled American labs run by Chinese that distilled...

[Milei in English - Official Account @jmilei_english]

The only left that works is Messi's. ⚽

LONG LIVE FREEDOM, DAMN IT...!!! 🇦🇷

[Kuang Xu @ProfKuangXu]

@Mikeg6007 🫡💪💪

[Kuang Xu @ProfKuangXu]

My first Independence Day as a US citizen. I came here 2005 an awkward non-English speaking teenager. I naturalized exactly 20 years later.

Thank you to so many amazing Americans that helped me on the way, of all colors and accents. On this July 4th, I’m reminded that this is a country that rewards hardwork, merit, bold imagination and the enterprising spirit. No matter your color and no matter your accents.

I’m also reminded that such values are not to be taken for granted, but to be treasured and fought for.

Happy birthday 🇺🇸🇺🇸🇺🇸

[Kuang Xu @ProfKuangXu]

@Mikeg6007 About what?

[Kuang Xu @ProfKuangXu]

@shaunmmaguire You have been one of those Americans who helped me bro. Thanks for the inspiration!

[Kuang Xu @ProfKuangXu]

@sang_wen @MIT Legend bro 🚀🚀

[Kuang Xu @ProfKuangXu]

@djrockysmith Most people are for merits, yes

[Kuang Xu @ProfKuangXu]

@balogun That goal against Bosnia was breathtaking champ! What a shame they gave you that card

[Kuang Xu @ProfKuangXu]

@Yuchenj_UW 祝贺！内容很不错！

[Kuang Xu @ProfKuangXu]

@jcweb11 Lucky as fuck. Very grateful 🙏 happy fourth!