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message: "If you use this study or its processed results, please cite this record."
title: "Quantization Regime and Governed Routing: A 2x2 Study of QAT Q4_0 versus PTQ Q4_K_M for Gemma 4 12B and 26B MoE under a Fixed Governance Stack"
type: article
authors:
- family-names: Toeda
given-names: Taiko
orcid: "https://orcid.org/0009-0001-7267-0201"
affiliation: Independent Researcher
version: 1.0.1
date-released: 2026-08-11
license: CC-BY-4.0
identifiers:
- type: doi
value: "10.5281/zenodo.21875513"
description: Zenodo archival record (published 2026-08-11)
repository-code: "https://github.com/mobius-style/gemma4-quant-regime-study"
url: "https://doi.org/10.5281/zenodo.21875513"
abstract: >-
A 2x2 study (quantization regime x released model pair) of governed
routing quality for Gemma 4 12B (dense, same-base pair) and a 26B-class
MoE released pair on one RTX 5070 Ti: within-pair regime effects are
marginal and oppositely signed; the regime x pair interaction — an
exploratory single-run endpoint — is +0.030 with a stem-clustered 95%
CI of [+0.010, +0.052], concentrated in the volatile-current family;
and only 23-32% of temperature-0 outputs are byte-identical across
regimes against 100% same-configuration repeat determinism in all four
cells. The license field describes the paper and data; analysis code is
Apache-2.0 (see LICENSE.md). Sequel to DOI 10.5281/zenodo.21860461.
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