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abstract indexed · arXiv 2609.19683 · updated 2026-10-18

MiX: Micro-Inverted-Scaling for End-to-End Low-Bit Vision-Language Model Acceleration

First page of MiX: Micro-Inverted-Scaling for End-to-End Low-Bit Vision-Language Model Acceleration
From the original paper · arXiv 2609.19683Page 1. Select the image to read the PDF.

MiX replaces shared-exponent microscaling block formats (NVFP4/MX-style) with a format grouping private per-element exponents under one shared mantissa, so multipliers in the datapath become shifters, and pairs it with a dual-format inference framework for VLM outlier topologies. The cost is that the claimed speed, energy, and area gains exist only on a custom accelerator that does not exist as a product; on the reader's GPU there is no hardware support for this format, so only the quantization accuracy result is indirectly relevant. It can fail in practice because accuracy parity was shown on selected VLMs and benchmarks, the dual-format path adds format-selection complexity, and simulated accelerator results often do not survive contact with real silicon or vendor toolchains.

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Why it was shortlisted

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research area
quantization
technical change
Inverted-microscaling low-bit format with custom accelerator
published
2026-09-17

The reader has a single commodity GPU and cannot fabricate or purchase the custom accelerator the performance claims depend on, so this is a hardware-design contribution to track rather than an adoptable or testable technique.

About the technical core

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  1. claim 01Paperraft inference
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    MiX replaces shared-exponent microscaling block formats (NVFP4/MX-style) with a format grouping private per-element exponents under one shared mantissa, so multipliers in the datapath become shifters, and pairs it with a dual-format inference framework for VLM outlier topologies. The cost is that the claimed speed, energy, and area gains exist only on a custom accelerator that does not exist as a product; on the reader's GPU there is no hardware support for this format, so only the quantization accuracy result is indirectly relevant. It can fail in practice because accuracy parity was shown on selected VLMs and benchmarks, the dual-format path adds format-selection complexity, and simulated accelerator results often do not survive contact with real silicon or vendor toolchains.

    This is a Paperraft inference. It is not pinned to a verified PDF passage.

    Inspect the source
  2. claim 02Paperraft inference

    4.5-bit MiX matches or exceeds NVFP4 accuracy on multimodal benchmarks; the custom accelerator delivers 2.3-4.5x speedup, 1.4-2.9x energy reduction over the Focus accelerator, and 25% better area efficiency than NVFP4 baseline.

    This is a Paperraft inference. It is not pinned to a verified PDF passage.

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quality

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compute and memory

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latency

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operations

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software compatibility

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security

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data and training

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reproducibility

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What to inspect

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Inside the paper

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arXiv 2609.19683

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