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Jiaxuan You

Assistant Professor, Siebel School of Computing and Data Science; leads U Lab, University of Illinois Urbana-Champaign

Jiaxuan You is an Assistant Professor in the Siebel School of Computing and Data Science at the University of Illinois Urbana-Champaign, where You leads U Lab. You is the senior author of the LLMRouter paper, which describes the open-source library for routing queries among large language models that U Lab maintains. You's research focuses on AI agents, building on work in graph learning, reasoning, planning and LLM systems.1234

At a glance

Current role
Assistant Professor, Siebel School of Computing and Data Science; leads U Lab
Sector
University
Education
Stanford, UIUC
Work listed
3
Sources cited
8
Profile reviewed

Career

You received a PhD in computer science from Stanford University in 2021, advised by Jure Leskovec. From 2021 to 2023 You was a core founding member of Kumo AI, building a graph learning predictive system for relational databases, and You later worked at NVIDIA as a Senior Research Scientist on LLM pretraining and post-training.12

Since 2024 You has been an assistant professor in the Siebel School of Computing and Data Science at UIUC, where You leads U Lab. Courses listed on the school's profile include data mining principles and a topics course on LLM agents.21

Research

You describes research thrusts in self-evolving, research, social, recommender, persuasion and tutor agents, grounded in graph learning, reasoning and planning and in LLM systems, memory and retrieval. A line of the group's work studies routing among language models, from GraphRouter (2024) and GraphPlanner (2026) to the LLMRouter library and paper (2026).1563

Work and contributions

  • LLMRouter Open-source code

    Senior author of the LLMRouter paper (2026), which presents the library maintained in U Lab's GitHub organization along with the xRouteBench routing benchmark.374

  • GraphRouter Published research

    Co-author with Tao Feng and Yanzhen Shen of "GraphRouter: A Graph-based Router for LLM Selections" (2024).5

  • Design Space for Graph Neural Networks Published research

    First author, with Rex Ying and Jure Leskovec, of "Design Space for Graph Neural Networks" (2020).8

Timeline

  1. Posted "Design Space for Graph Neural Networks" as first author with Rex Ying and Jure Leskovec.8
  2. Received a PhD in computer science from Stanford University.2
  3. Became a core founding member of Kumo AI, a role held until 2023.1
  4. Joined the University of Illinois Urbana-Champaign as an assistant professor.2
  5. Co-authored GraphRouter, a graph-based router for selecting LLMs.5
  6. Co-authored GraphPlanner, on graph memory-augmented agentic routing for multi-agent LLMs.6
  7. Released LLMRouter with U Lab collaborators as the paper's senior author.34

Other documented roles

Roles the sources document that are not confirmed as current.

  • Core founding member (2021–2023), Kumo AI1
  • Senior Research Scientist, NVIDIA1

Where they work

Suggest a correction or removal

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References

8 sources · profile reviewed Oct 22, 2026 · data updated Oct 22, 2026

  1. Jiaxuan You — homepageJiaxuan You · Official page · accessed Oct 22, 2026
  2. Jiaxuan You — Siebel School of Computing and Data Science profileUniversity of Illinois Urbana-Champaign · Official page · accessed Oct 22, 2026
  3. LLMRouter: Unified Infrastructure for Developing, Evaluating, and Deploying LLM Routers (arXiv 2608.06867)arXiv · Paper · published Aug 7, 2026 · accessed Oct 22, 2026
  4. ulab-uiuc/LLMRouter READMEU Lab (GitHub repository) · Repository · accessed Oct 22, 2026
  5. GraphRouter: A Graph-based Router for LLM Selections (arXiv 2410.03834)arXiv · Paper · published Oct 4, 2024 · accessed Oct 22, 2026
  6. GraphPlanner: Graph Memory-Augmented Agentic Routing for Multi-Agent LLMs (arXiv 2604.23626)arXiv · Paper · published Apr 26, 2026 · accessed Oct 22, 2026
  7. LLMRouter project page (authors and affiliations)U Lab, UIUC · Documentation · accessed Oct 22, 2026
  8. Design Space for Graph Neural Networks (arXiv 2011.08843)arXiv · Paper · published Nov 17, 2020 · accessed Oct 22, 2026