# Representation-Space MMD for Diffusion Language Models > Source: > Published: 2026-10-06 07:00:00+00:00 We introduce a post-training method for diffusion language models (DLMs) that minimizes Maximum Mean Discrepancy (MMD) between generated and reference distributions in the feature space of a frozen pretrained DLM. To estimate MMD, we retain contextual features at individual token positions, obtainin