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RangeSWA extends continuous diffusion language models past their training length without any training, by remapping positions and adapting attention

AspireAI community · arXiv (cs.CL)
Continuous diffusion language models tend to repeat text, drift semantically and degrade once generation runs longer than the length they were trained on. RangeSWA is a training-free length extrapolation method that combines local sliding-window attention, remote block summaries and dynamic content retrieval to keep local detail while supporting long-range context. Degradation is addressed with positional remapping, conditioning attention correction and denoising-stage-adaptive window scheduling. Across multiple continuous diffusion language models the authors report reduced generative perplexity and lower text repetition rates in long-text generation. The abstract reports directions of improvement rather than specific figures, and the method's dependence on sliding windows means it trades exact long-range recall for stability at the boundary.
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