ReLay: Personalized LLM-Generated Plain-Language Summaries for Better Understanding, but at What Cost? - Joey Chan; Yikun Han; Jingyuan Chen; Samuel Fang; Lauren D. Gryboski; Alexandra Lee; Sheel Tanna; Qingqing Zhu; Zhiyong Lu; Lucy Lu Wang; Yue Guo (CoRR, 2026)