KETCHUP: K-Step Return Estimation for Sequential Knowledge Distillation
KETCHUP is a new method for Reinforcement Learning knowledge distillation that uses a K-step return estimation based on the Bellman Optimality Equation. It extends standard RL to look K steps ahead, which significantly reduces gradient variance and stabilizes training. This leads to better performance in text generation tasks compared to existing methods like LLMR, especially for larger models.