@article{arXiv'26:SaveRouter,
    author = {Guannan Lai and Gelin Bian and Hao-Xuan Ma and Jun-Peng Jiang and Long Chen and Jian-Dong Liu and Zhi-Hao Tan and Han-Jia Ye},
    title = {Routing Should Pay for Itself: Sparse Supervision for Economical {LLM} Routing},
    journal = {arXiv preprint arXiv:2609.37402},
    year = {2026}
}