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NCM: Next-Concept Modeling: Fast, Parallel Coarse-to-Fine Text Generation (arxiv.org)
4 points by based2 14 hours ago | hide | past | pdf | 2 comments on HN

In plain words: Text is squeezed into layers of codes from rough to fine, and a transformer writes each layer's codes at once instead of one word at a time. It beat the strongest diffusion text model while running 21 times faster on a large language dataset.

Abstract · Next-Concept Modeling: Fast, Parallel Coarse-to-Fine Text Generation

Diffusion language models (DLMs) offer parallel sampling for faster generation than autoregressive models, an increasingly important advantage as inference becomes a dominant computational workload. However, DLMs degrade quickly with fewer sampling steps, process the full sequence at every step, and require many passes over the dataset to reach good quality. We introduce Next-Concept Modeling (NCM), a two-stage, coarse-to-fine framework: a multiscale residual VQ-VAE encodes text into a hierarchy of discrete codes, and a transformer generates one level at a time, predicting all codes within a level in parallel. At matched parameter scales, NCM achieves better generative perplexity than the strongest DLM baseline on LM1B while running $21\times$ faster. On OpenWebText, NCM is competitive with the strongest DLM while running $10\times$ faster; on XSum, it matches the strongest DLM's ROUGE-L while being $31\times$ faster. On the reasoning task of Sudoku, NCM outperforms autoregressive and diffusion baselines across all difficulty levels, using fewer function evaluations. On the reasoning task of Sudoku, NCM outperforms autoregressive and diffusion baselines across all difficulty levels, using fewer function evaluations.

Hermann Kumbong, Ishan S. Khare, Iddah Mlauzi, Andrew Woen, Charles Ding, E. Kelly Buchanan, Simran Arora, Azalia Mirhoseini, Christopher Ré
arXiv:2610.14162 · cs.CL, cs.AI, cs.LG · submitted Oct 9, 2026
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Also discussed: Nov 2026 (72 points, 7 comments) · Oct 2026 (2 points, 0 comments) · Oct 2026 (4 points, 0 comments)

this is amazing, if these kinds of concepts are really close to human conceptuality we're basically at AGI