GISTBench: Evaluating LLM User Understanding via Evidence-Based Interest Verification. - Iordanis Fostiropoulos; Muhammad Rafay Azhar; Abdalaziz Sawwan; Boyu Fang; Yuchen Liu; Jiayi Liu; Hanchao Yu; Qi Guo; Jianyu Wang; Fei Liu; Xiangjun Fan (CoRR, 2026)