Deep Research Agents (DRAs) can autonomously conduct complex investigations and generate comprehensive reports, demonstrating strong real-world potential. However, existing evaluations mostly rely on close-ended benchmarks, while open-ended deep research benchmarks remain scarce and typically neglect personalized scenarios. To bridge this gap, we introduce Personalized Deep Research Bench (PDR-Bench), the first benchmark for evaluating personalization in DRAs. It pairs 50 diverse research tasks across 10 domains with 25 authentic user profiles that combine structured persona attributes with dynamic real-world contexts, yielding 250 realistic user-task queries. To assess system performance, we propose the PQR Evaluation Framework, which jointly measures Personalization Alignment, Content Quality, and Factual Reliability. Our experiments on a range of systems highlight current capabilities and limitations in handling personalized deep research. This work establishes a rigorous foundation for developing and evaluating the next generation of truly personalized AI research assistants.
@article{arxiv.2509.25106,
title = {Towards Personalized Deep Research: Benchmarks and Evaluations},
author = {Yuan Liang and Jiaxian Li and Yuqing Wang and Piaohong Wang and Motong Tian and Pai Liu and Shuofei Qiao and Runnan Fang and He Zhu and Ge Zhang and Minghao Liu and Yuchen Eleanor Jiang and Ningyu Zhang and Wangchunshu Zhou},
journal= {arXiv preprint arXiv:2509.25106},
year = {2026}
}