Hacking Generative Perplexity: Why Unconditional Text Evaluation Needs New Metrics.

arXiv:2606.08417v3 Announce Type: replace-cross Abstract: Diffusion language models (DLMs) have emerged as the leading non-autoregressive alternative to language modeling. Because their likelihoods are intractable, generative perplexity (gen-PPL) has become th