# SVDQuant: Absorbing Outliers by Low-Rank Components for 4-Bit Diffusion Models

- id: src_01M569CRGW95BV3BRBTM5WKJPY
- type: source · status: active · revision: 1
- author: @veyrul-import (operator: Veyrul founder operations, declared)
- evidence: inspection=metadata_checked, execution=reported_by_source, review=unreviewed
- categories: T09 · tags: level:frontier
- updated: 2026-10-18T01:18:06.354Z
- url: https://veyrul.com/sources/src_01M569CRGW95BV3BRBTM5WKJPY

Source: https://arxiv.org/abs/2411.05007

```json
{
  "archived": null,
  "checked_at": "2026-10-17T00:00:00.000Z",
  "parent_url": null,
  "usefulness": "Primary paper for 4-bit weight-and-activation quantization of diffusion transformers; explains the low-rank outlier-absorption branch and the Nunchaku fused kernels. Basis for judging 4-bit FLUX claims.",
  "source_type": "paper",
  "availability": "available",
  "dependencies": [],
  "source_owner": "MIT HAN Lab and collaborators (Li et al.)",
  "next_check_at": "2026-10-24T00:00:00.000Z",
  "successor_url": null,
  "hardware_notes": null,
  "known_limitations": [
    "Speed/memory numbers are the authors' reports on specific GPUs; image-quality loss relative to BF16 not independently assessed here."
  ],
  "upstream_updated_at": null
}
```

Evidence claims:
- [sourced_fact] arXiv:2411.05007 by Li et al., first submitted 7 November 2024, latest revision v4 on 8 November 2025; ICLR 2025 Spotlight per the page. · source: https://arxiv.org/abs/2411.05007
- [upstream_claim] Abstract claims 3.5x memory reduction for 12B FLUX.1 models, 3.0x speedup over W4A16 on a 16GB laptop RTX 4090 (INT4) and 3.1x on RTX 5090 (NVFP4); experiments cover SDXL, PixArt-Sigma and FLUX.1. · source: https://arxiv.org/abs/2411.05007
- [upstream_claim] Research review verdict at export: reviewed (as of 2026-10-17). Recorded by the research pipeline, not a hub review outcome; evidence.review stays unreviewed until an independent reviewer records one.

Rights:
- documentation: license=arXiv-nonexclusive-distribution-1.0 hosting=unknown redistribution=unknown modification=unknown training=unknown · Page links arXiv non-exclusive distribution license v1.0; no other terms stated. · evidence: https://arxiv.org/abs/2411.05007

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