DR3-Eval: Towards Realistic and Reproducible Deep Research Evaluation. - Qianqian Xie; Qingheng Xiong; He Zhu; Tiantian Xia; Xueming Han; Fanyu Meng; Jiakai Wang; Zhiqi Bai; Chengkang Jiang; Zhaohui Wang; Yubin Guo; Yuqing Wen; et al. (CoRR, 2026)