Author

Wen-Chih Peng

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Jul 2026

VDAR-Router: Adaptive LLMs Routing via Verbalized Query Difficulty Analysis Retrieval

VDAR-Router is proposed, a difficulty-aware retrieval-based routing framework for training-free LLM routing that consistently achieves better cost-performance trade-offs than existing baselines and helps retrieve more relevant examples and supports more reliable routing decisions.

Yu-Chien Tang, Jun-Chen Hung, Wen-Chih Peng et al. · arXiv.org · 0 citations