@article{provableandpracticalincontextpolicyoptim, title = {Provable and Practical In-Context Policy Optimization for Self-Improvement}, author = {Tianrun Yu and Yuxiao Yang and Zhaoyang Wang and Kaixiang Zhao and Porter Jenkins and Xuchao Zhang and Chetan Bansal and Huaxiu Yao and Weitong Zhang}, year = {2026}, eprint = {2603.01335}, archivePrefix = {arXiv}, url = {https://arxiv.org/abs/2603.01335}, }