Yixiao (Jack) Zeng

Yixiao (Jack) Zeng

Introduction

I am Yixiao Zeng (Chinese name: 曾一笑). I understand that my name can be difficult to pronounce for non-native Chinese speakers, so you can also call me Jack.

I am currently a Machine Learning Engineer at XPENG (小鹏) U.S., where I focus on LLM inference and serving optimization, as well as inference optimization for world-model simulation. I received my master's degree from Carnegie Mellon University's Master of Science in Intelligent Information Systems (MIIS) program under the supervision of Prof. Lei Li. I earned my bachelor's degree from the University of California, Irvine, under the supervision of Prof. Marco Levorato.

I previously interned at Microsoft Research Asia (MSRA), supervised by Prof. Ting Cao, and at Amazon Bedrock.

Selected Publications

X-Cache: Cross-Chunk Block Caching for Few-Step Autoregressive World Models Inference
2026 arXiv (XPeng AI Infra Technical Report)
Yixiao Zeng, Jianlei Zheng, Chaoda Zheng, Shijia Chen, Mingdian Liu, Tongping Liu, Tengwei Luo, Yu Zhang, Boyang Wang, Linkun Xu, Siyuan Lu, Bo Tian, Xianming Liu
RARE: Retrieval-Aware Robustness Evaluation for Retrieval-Augmented Generation Systems
2026 arXiv
Yixiao Zeng, Tianyu Cao, Danqing Wang, Xinran Zhao, Zimeng Qiu, Morteza Ziyadi, Tongshuang Wu, Lei Li
Prompt-MII: Meta-Learning Instruction Induction for LLMsPrompt-MII: Meta-Learning Instruction Induction for LLMs
2026 ICLR 2026
Emily Xiao, Yixiao Zeng, Ada Chen, Chin-Jou Li, Amanda Bertsch, Graham Neubig
HARDTESTGEN: A High-Quality RL Verifier Generation Pipeline for LLM CodingHARDTESTGEN: A High-Quality RL Verifier Generation Pipeline for LLM Coding
2026 ICLR 2026
Zhongmou He, Yee Man Choi, Kexun Zhang, Ivan Bercovich, Jiabao Ji, Junting Zhou, Dejia Xu, Aidan Zhang, Yixiao Zeng, Lei Li
Improving Multi-candidate Speculative Decoding
2024 NeurIPS 2024 ENLSP-IV
Yixiao Zeng, Xiaofan Lu, Feiyang Ma, Zixu Yu, Marco Levorato