# Scaling Up Offline Model-Based RL with Action Chunks (MAC)
In *“Scalable Offline Model-Based RL with Action Chunks”* (Park et al., 2025) – by Kwanyoung Park, Seohong Park, Youngwoon Lee, and Sergey Levine (UC Berkeley and Yonsei Univ.) – the authors tackle a central problem in offline reinforc...