Xin Liu

Xin Liu is a Senior Research Scientist at Google Research. He received his PhD in Computer Science from the University of Washington in 2023, where he was advised by Shwetak Patel and Daniel McDuff. His PhD research was supported by the Google PhD Fellowship .

Before joining UW, he obtained his bachelor’s degree in computer science from the University of Massachusetts Amherst in 2018, where he started his research with Sunghoon Ivan Lee .

His work is at the intersection of AI for health and science, LLM reasoning, and machine learning. He is interested in building a unified AGI system that benefits for social good.

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Selected Publications

Venues in dark blue; paper titles in blue; roles/remarks in red.
AI for Health
  1. [5]
    A. Ali Heydari#, Ken Gu#, Vidya Srinivas#, Hong Yu#, Zhihan Zhang, Yuwei Zhang, Akshay Paruchuri, Qian He, Hamid Palangi, Nova Hammerquist, Ahmed A. Metwally, Brent Winslow, Yubin Kim, Kumar Ayush, Yuzhe Yang, Girish Narayanswamy, Maxwell A. Xu, Jake Garrison, Amy Aremnto Lee, Jenny Vafeiadou, Ben Graef, Isaac R. Galatzer-Levy, Erik Schenck, Andrew Barakat, Javier Perez, Jacqueline Shreibati, John Hernandez, Anthony Z. Faranesh, Javier L. Prieto, Connor Heneghan, Yun Liu, Jiening Zhan, Mark Malhotra, Shwetak Patel, Tim Althoff, Xin Liu$, Daniel McDuff$, Xuhai Xu$
    The Anatomy of a Personal Health Agent
    Preprint, 2025
    PaperCodeBlog
    $ Equal Leadership, Corresponding Author# Equal Contribution
  2. [4]
    Justin Khasentino#, Anastasiya Belyaeva#$, Xin Liu #$, Zhun Yang#, Nicholas A. Furlotte#, Chace Lee, Erik Schenck, Yojan Patel, Jian Cui, Logan Douglas Schneider, Robby Bryant, Ryan G. Gomes, Allen Jiang, Roy Lee, Yun Liu, Javier Perez, Jameson K. Rogers, Cathy Speed, Shyam Tailor, Megan Walker, Jeffrey Yu, Tim Althoff, Conor Heneghan, John Hernandez, Mark Malhotra, Leor Stern, Yossi Matias, Greg S. Corrado, Shwetak Patel, Shravya Shetty, Jiening Zhan, Shruthi Prabhakara, Daniel McDuff$, Cory Y. McLean$
    A Personal Health Large Language Model for Sleep and Fitness Coaching
    Nature Medicine, 2025
    PaperCodeBlog
    # Equal Contribution$ Corresponding Author
  3. [3]
    Mike A. Merrill #, Akshay Paruchuri #, Naghmeh Rezaei, Geza Kovacs, Javier Perez, Yun Liu, Erik Schenck, Nova Hammerquist, Jake Sunshine, Shyam Tailor, Kumar Ayush, Hao-Wei Su, Qian He, Cory Y. McLean, Mark Malhotra, Shwetak Patel, Jiening Zhan, Tim Althoff $, Daniel McDuff $, Xin Liu $
    Transforming Wearable Data into Health Insights Using Large Language Model Agents
    Nature Communications (Conditionally accepted), 2025
    PaperCodeBlog
    $ Equal Leadership, Corresponding Author# Equal Contribution, Primary host of the first authors.Incorporated in a Google product.
  4. [2]
    Shun Liao #, Paolo Di Achille #, Jiang Wu #, Silviu Borac #, Jonathan Wang #, Xin Liu #, Eric Teasley #, Lawrence Cai, Yun Liu, Daniel McDuff, Hao-Wei Su, Brent Winslow, Anupam Pathak, Shwetak Patel, Jameson K. Rogers, Ming-Zher Poh
    Passive Heart Rate Monitoring During Smartphone Use in Everyday Life
    Under Major Revision at Nature, 2025
    Paper
    # Equal Contribution. Derived from my PhD research. Incorporated in a Google product.
  5. [1]
    Yuzhe Yang, Yujia Liu, Xin Liu, Avanti Gulhane, Domenico Mastrodicasa, Wei Wu, Edward J. Wang, Dushyant W. Sahani, Shwetak Patel
    Demographic Bias of Expert-Level Vision-Language Foundation Models in Medical Imaging
    Science Advances, 2024
    PaperCode
Large Language Model Reasoning
  1. [4]
    Gheorghe Comanici, Eric Bieber, Mike Schaekermann, Ice Pasupat, Noveen Sachdeva, Inderjit Dhillon, Marcel Blistein, Ori Ram, Dan Zhang, Evan Rosen, ... Xin Liu, ...
    Gemini 2.5: Pushing the Frontier with Advanced Reasoning, Multimodality, Long Context, and Next Generation Agentic Capabilities
    Tech Report, 2025
    PaperBlog
    Core contributor of tabular reasoning and data science reasoning.
  2. [3]
    Ken Gu, Zhihan Zhang, Kate Lin, Yuwei Zhang, Akshay Paruchuri, Hong Yu, Mehran Kazemi, Kumar Ayush, A Ali Heydari, Maxwell A Xu, Girish Narayanswamy, Yun Liu, Ming-Zher Poh, Yuzhe Yang, Mark Malhotra, Shwetak Patel, Hamid Palangi, Xuhai Xu, Daniel McDuff, Tim Althoff, Xin Liu
    RADAR: Benchmarking Language Models on Imperfect Tabular Data
    Under Review at NeurIPS, 2025
    PaperCode
    Integrated in Gemini. Primary host of the first author.
  3. [2]
    Mehran Kazemi, Bahare Fatemi, Hritik Bansal, John Palowitch, Chrysovalantis Anastasiou, Sanket Vaibhav Mehta, Lalit K. Jain, Virginia Aglietti, Disha Jindal, Peter Chen, Nishanth Dikkala, Gladys Tyen, Xin Liu, Uri Shalit, Silvia Chiappa, Kate Olszewska, Yi Tay, Vinh Q. Tran, Quoc V. Le, Orhan Firat
    Big-Bench Extra Hard
    ACL (Main), 2025
    PaperCode
    Integrated in Gemini. Core contributor of tabular reasoning.
  4. [1]
    Akshay Paruchuri, Jake Garrison, Shun Liao, John Hernandez, Jacob Sunshine, Tim Althoff, Xin Liu $, Daniel McDuff $
    What Are the Odds? Language Models Are Capable of Probabilistic Reasoning
    EMNLP (Main), 2024
    PaperCodeBlog
    $ Equal Leadership, Corresponding Author. Primary host of the first author.
Machine Learning
  1. [5]
    Maxwell A. Xu #, Girish Narayanswamy #, Kumar Ayush, Dimitris Spathis, Shun Liao, Shyam A. Tailor, Ahmed Metwally, A. Ali Heydari, Yuwei Zhang, Jake Garrison, Samy Abdel-Ghaffar, Xuhai Xu, Ken Gu, Jacob Sunshine, Ming-Zher Poh, Yun Liu, Tim Althoff, Shrikanth Narayanan, Pushmeet Kohli, Mark Malhotra, Shwetak Patel, Yuzhe Yang, James M. Rehg, Xin Liu $, Daniel McDuff $
    LSM-2: Learning from Incomplete Wearable Sensor Data
    Under Review at NeurIPS, 2025
    PaperBlog
    $ Equal Leadership, Corresponding Author# Equal Contribution, Co-host of the first authors.
  2. [4]
    Yuwei Zhang #, Kumar Ayush #, Siyuan Qiao, A. Ali Heydari, Girish Narayanswamy, Maxwell A. Xu, Ahmed A. Metwally, Shawn Xu, Jake Garrison, Xuhai Xu, Tim Althoff, Yun Liu, Pushmeet Kohli, Jiening Zhan, Mark Malhotra, Shwetak Patel, Cecilia Mascolo, Xin Liu, Daniel McDuff, Yuzhe Yang
    SensorLM: Learning the Language of Wearable Sensors
    Under Review at NeurIPS, 2025
    PaperBlog
    $ Co-senior Author, Core Contributor.
  3. [3]
    Girish Narayanswamy #, Xin Liu #$, Kumar Ayush, Yuzhe Yang, Xuhai Xu, Shun Liao, Jake Garrison, Shyam Tailor, Jake Sunshine, Yun Liu, Tim Althoff, Shrikanth Narayanan, Pushmeet Kohli, Jiening Zhan, Mark Malhotra, Shwetak Patel, Samy Abdel-Ghaffar, Daniel McDuff†$
    Scaling Wearable Foundation Models
    ICLR, 2025
    PaperBlog
    $ Equal Leadership, Corresponding Author# Equal Contribution, Co-host of the first author.
  4. [2]
    Yuzhe Yang, Xin Liu, Jiang Wu, Silviu Borac, Dina Katabi, Ming-Zher Poh, Daniel McDuff
    SimPer: Simple Self-Supervised Learning of Periodic Targets
    ICLR 2023
    PaperCodeBlog
    Oral, Notable Top 5% Submission
  5. [1]
    Xin Liu, Josh Fromm, Shwetak Patel, Daniel McDuff
    Multi-Task Temporal Shift Attention Networks for On-Device Contactless Vitals Measurement
    NeurIPS 2020
    PaperCodeBlog
    Oral, Top 1%, 105 out of 9454 Submissions
Misc

During my free time, I enjoy playing tennis, skiing, snowboarding, biking, and climbing with my partner. I have a cute cat called Cooper!


Website Credits to Jon Barron source code and Siddhartha Gairola source code