Author

Y. Park

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#artificial intelligence Preprint Sep 2026

Learning Beyond What You Sample: Off-Policy-Aware Cross-Model Trajectory Exchange for RLVR

Reinforcement Learning with Verifiable Rewards (RLVR) methods such as GRPO rely on successful self-generated trajectories, but finite rollout budgets can produce all-fail groups with no reward-based policy-gradient signal. While additional rollouts improve the chance of success at higher cost, successful trajectories m...

Doohyuk Jang, Y. Park, Gyouk Chu et al. · 0 citations

Preprint Sep 2026

Looks the Same, Answers Differently: Flip-Direction Steering for Robust Vision-Language Reasoning

Vision-language models (VLMs) achieve strong visual reasoning performance, yet subtle changes from routine image capture and processing can alter their reasoning trajectories even when images appear nearly identical. In long-horizon generation, the resulting activation shifts may accumulate across decoding steps, progr...

Yeonsung Jung, Joonhyun Jeong, Hoang Pham et al. · 0 citations