Less is More for RAG: Information Gain Pruning for Generator-Aligned Reranking and Evidence Selection
Paper • Jan 24, 2026 • arxiv.org • Zhipeng Song, Yizhi Zhou, Xiangyu Kong, Jiulong Jiao, Xinrui Bao, Xu You, Xueqing Shi, Yuhang Zhou, Heng Qi
Retrieval-augmented generation (RAG) grounds large language models with external evidence, but under a limited context budget, the key challenge is deciding which retrieved passages should be injec...