Portrait of Alex Xie

Alex Xie

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Alex Xie

Hi there! I'm a research engineer at Cartesia.

Before this, I did my master's in language technologies at Carnegie Mellon, where I was fortunate to be co-advised by Matt Gormley and Daniel Fried; I also worked closely with Carolyn Rosé. I worked on various aspects of AI for code: evaluation, interaction, and security. More broadly, I'm interested in human-AI interaction and collaboration.

Even earlier, I did my undergrad in CS at CMU and worked with Vincent Hellendoorn.

Publications

    Secure and Useful Models are Reasonable: Aligning Code Models via Utility-Preserving Reasoning
    Atharva Naik, Alex Xie, Abhinav Rao, Anmol Agarwal, Shubham Gandhi, Michael Hilton, Carolyn Rosé
    CMU system report for Amazon Nova AI Challenge 2025
    Identifying & Interactively Refining Ambiguous User Goals for Data Visualization Code Generation
    Mert Inan, Anthony Sicilia, Alex Xie, Saujas Vaduguru, Daniel Fried, Malihe Alikhani
    EMNLP 2025
    RepoST: Scalable Repository-Level Coding Environment Construction with Sandbox Testing
    Yiqing Xie, Alex Xie, Divyanshu Sheth, Pengfei Liu, Daniel Fried, Carolyn Rosé
    COLM 2025
    From Decoding to Meta-Generation: Inference-time Algorithms for Large Language Models
    Sean Welleck, Amanda Bertsch, Matthew Finlayson, Hailey Schoelkopf, Alex Xie, Graham Neubig, Ilia Kulikov, Zaid Harchaoui
    TMLR 2024
    It's MBR All the Way Down: Modern Generation Techniques Through the Lens of Minimum Bayes Risk
    Amanda Bertsch*, Alex Xie*, Graham Neubig, Matthew R. Gormley
    Big Picture Workshop at EMNLP 2023