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DLM-One: Diffusion Language Models for One-Step Sequence Generation

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arxiv 2506.00290 v1 pith:35LVDVKP submitted 2025-05-30 cs.CL cs.LGstat.ML

classification cs.CLcs.LGstat.ML
keywords dlm-onelanguagecontinuousdiffusiongenerationmodelsone-stepembedding
verification ladder T0 review T1 audit T2 compute T3 formal
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This paper introduces DLM-One, a score-distillation-based framework for one-step sequence generation with continuous diffusion language models (DLMs). DLM-One eliminates the need for iterative refinement by aligning the scores of a student model's outputs in the continuous token embedding space with the score function of a pretrained teacher DLM. We investigate whether DLM-One can achieve substantial gains in sampling efficiency for language modeling. Through comprehensive experiments on DiffuSeq -- a representative continuous DLM -- we show that DLM-One achieves up to ~500x speedup in inference time while maintaining competitive performance on benchmark text generation tasks used to evaluate the teacher models. We further analyze the method's empirical behavior across multiple datasets, providing initial insights into its generality and practical applicability. Our findings position one-step diffusion as a promising direction for efficient, high-quality language generation and broader adoption of continuous diffusion models operating in embedding space for natural language processing.

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Cited by 6 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. VoidPadding: Let [VOID] Handle Padding in Masked Diffusion Language Models so that [EOS] Can Focus on Semantic Termination

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    VoidPadding decouples padding from termination in MDLMs via a new [VOID] token, delivering +17.84 average benchmark points and 55.7% fewer decoding steps on Dream-7B-Instruct.

  2. Coupling Models for One-Step Discrete Generation

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    Coupling Models enable single-step discrete sequence generation via learned couplings to Gaussian latents and outperform prior one-step baselines on text perplexity, biological FBD, and image FID metrics.

  3. Continuous Latent Diffusion Language Model

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    Cola DLM proposes a hierarchical latent diffusion model that learns a text-to-latent mapping, fits a global semantic prior in continuous space with a block-causal DiT, and performs conditional decoding, establishing l...

  4. FlowLM: Few-Step Language Modeling via Diffusion-to-Flow Adaptation

    cs.CL 2026-04 unverdicted novelty 6.0 of 10

    FlowLM converts diffusion LMs to flow matching via fine-tuning, achieving few-step generation that rivals or beats 2000-step diffusion and saturates faster than training flow models from scratch.

  5. FastDiSS: Few-step Match Many-step Diffusion Language Model on Sequence-to-Sequence Generation--Full Version

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    A training framework perturbs self-conditioning signals in diffusion language models to match few-step inference noise, enabling up to 400x faster sampling while surpassing standard continuous diffusion performance on...

  6. Streaming-dLLM: Accelerating Diffusion LLMs via Suffix Pruning and Dynamic Decoding

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    A training-free inference framework prunes suffix masks, adapts confidence thresholds, and early-exits at EOS to speed up diffusion LLM decoding by up to 68×.

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