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abstract indexed · arXiv 2609.38166 · updated 2026-10-18

LeapQuant: Efficient Linear Attention with Accurate Recurrent State Quantization

First page of LeapQuant: Efficient Linear Attention with Accurate Recurrent State Quantization
From the original paper · arXiv 2609.38166Page 1. Select the image to read the PDF.

LeapQuant replaces full-precision recurrent-state reads and updates in hybrid linear-attention models (Gated DeltaNet, Kimi Delta Attention) with 8-bit quantized states, using per-window quantization with buffered high-precision updates plus a few high-precision Compensator Tokens for outlier rows and columns. It is training-free and costs implementation complexity: custom kernels, window buffering logic, and residual smoothing must be integrated into the inference path. It can fail if the deployed stack lacks the paper's kernels (the 1.47x figure depends on specific GPU kernels), if the reader's models use standard attention rather than linear-attention hybrids, or if error accumulation resurfaces on workloads whose state outlier structure differs from the evaluated Qwen, Kimi, and GLM families.

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Try the idea on your product

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Compare against

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What to measure

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When to keep it

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Why it was shortlisted

The technical change, research area, and reason it entered the archive.

recommendation
test
research area
quantization
technical change
Recurrent-state quantization for linear attention
published
2026-09-29

The method is training-free and targets exactly the single-GPU long-context inference regime the reader operates in, but the end-to-end gain is modest, hardware-kernel-dependent, and only relevant if the reader serves linear-attention hybrid models, so workload-specific validation is required before adoption.

About the technical core

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Claims and evidence

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  1. claim 01Paperraft inference
    Read the brief interpretation

    LeapQuant replaces full-precision recurrent-state reads and updates in hybrid linear-attention models (Gated DeltaNet, Kimi Delta Attention) with 8-bit quantized states, using per-window quantization with buffered high-precision updates plus a few high-precision Compensator Tokens for outlier rows and columns. It is training-free and costs implementation complexity: custom kernels, window buffering logic, and residual smoothing must be integrated into the inference path. It can fail if the deployed stack lacks the paper's kernels (the 1.47x figure depends on specific GPU kernels), if the reader's models use standard attention rather than linear-attention hybrids, or if error accumulation resurfaces on workloads whose state outlier structure differs from the evaluated Qwen, Kimi, and GLM families.

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

    Inspect the source
  2. claim 02Paperraft inference

    Near-lossless 8-bit recurrent-state quantization with 2.05-3.70x kernel-level speedups and 1.47x end-to-end inference speedup on B200, RTX PRO 6000, and RTX 5090 GPUs, at accuracy comparable to FP32.

    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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Continue the investigation

A reading guide for quantization.

Editorial prompts, not findings from this paper or a validated test plan. Detailed analysis is still pending for the topics below.

What to inspect

Which layers and values are quantized? Check whether calibration data overlaps the evaluation set.

Plan a fair comparison

Can you compare the original and quantized model on identical prompts, hardware, and output limits?

Questions for adoption

Do memory savings and task quality hold at your context length and target concurrency?

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Inside the paper

Preview the first 3 pages of the original PDF. Click the stack to turn the page.

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Provisional research brief updated 2026-10-18. Paperraft has not reproduced this experiment.

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