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TopicsLarge language models Gender Bias in AI Systems

In a WildChat test, API-only model diffing missed Gemma 2 9B IT's fine-tuned female-user assumption.

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Neither method detects the ground-truth behavior, the finetuned model’s implicit assumption of a female user.

Simple LLM Baselines are Competitive for Model Diffingpreprintextraction 0.75

Kempf, Elias et al. · arXiv.org · Feb 10, 2026 · original

gemma-2-9b-it finetuned to assume a female user, diffed against base on 1,000 WildChat prompts; both methods surfaced generic quality degradation instead.

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