Machine Heart

May 16, 2026 · Artificial Intelligence

GIPO: Overcoming Utilization Collapse for Efficient Large‑Model Reinforcement Learning

GIPO (Gaussian Importance Sampling Policy Optimization) replaces PPO’s hard clipping with a smooth Gaussian‑weighted trust region, achieving log‑space symmetry and bias‑variance balance that mitigates policy lag and utilization collapse, and demonstrates superior stability and sample efficiency on GridWorld, LIBERO, MetaWorld, and 7‑billion‑parameter VLA experiments.