arXiv — NLP / Computation & Language · · 3 min read

FairLMs: A Turnkey Library for Fairness in Language Models

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Computer Science > Machine Learning

arXiv:2609.21296 (cs)
[Submitted on 18 Sep 2026]

Title:FairLMs: A Turnkey Library for Fairness in Language Models

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Abstract:Fairness research on language models involves measuring bias, applying mitigation methods, and examining the evidence on which an evaluation rests. Existing tools offer complementary functionality through different interfaces, so combining them requires reconciling model interfaces, evidence formats, access constraints, and result types before applicability can be checked or methods compared. We introduce \textbf{FairLMs}, a Python library that connects these activities through explicit declarations of model capabilities and input requirements. It provides 33 intrinsic and extrinsic metrics, 14 mitigation components spanning four intervention categories, 14 dataset and scoring-instrument diagnostics, adapters for the three Transformer architectures and supported hosted completion APIs, and benchmark loaders. Declarations are checked before execution and results carry the configuration under which they were obtained, so that compatible components can be combined, methods compared under a common protocol, and workflows extended to new models and datasets. The source code is available at: this https URL.
Subjects: Machine Learning (cs.LG); Computation and Language (cs.CL)
Cite as: arXiv:2609.21296 [cs.LG]
  (or arXiv:2609.21296v1 [cs.LG] for this version)
  https://doi.org/10.48550/arXiv.2609.21296
arXiv-issued DOI via DataCite (pending registration)

Submission history

From: Zichong Wang [view email]
[v1] Fri, 18 Sep 2026 04:11:40 UTC (24 KB)
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