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Yiming Gai

2 papers indexed

arxivcs.CLcs.AI2026-07-08

Comprehensive Evaluation of Large Language Model Responses: A Multi-Factor Scoring System

Yiming Gai, Junde Lu, Xuefei Huang

The remarkable performance of large language models (LLMs) in linguistic tasks underscores an urgent need for comprehensive evaluation of their response quality. Prevailing methods, often confined to singular dimensions, fall short of capturing the full spectrum of model capabili…

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arxivcs.IRcs.AI2026-07-03

Modality Relevance is not Modality Utility: Post-hoc Selective Modality Escalation for Cost-Aware Multimodal RAG

Xue Li, Yiming Gai

Multimodal retrieval-augmented generation (RAG) grounds a generator in evidence drawn from heterogeneous modalities -- text, tables, and images. The dominant deployment choice is binary and made before the model has tried to answer: either run a cheap text(+table) pipeline, or pa…

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