Semantic Loss Guided Data Efficient Supervised Fine Tuning for Safe Responses in LLMs

• URL: http://arxiv.org/abs/2412.06843v2
• Date: Wed, 11 Dec 2024 12:35:25 GMT
• Title: Semantic Loss Guided Data Efficient Supervised Fine Tuning for Safe Responses in LLMs
• Authors: Yuxiao Lu, Arunesh Sinha, Pradeep Varakantham,
• Abstract summary: Large Language Models (LLMs) generating unsafe responses to toxic prompts is a significant issue in their applications. In this paper, we aim to take this problem and overcome limitations of requiring significant high-quality human data. By employing a semantic cost combined with a negative Earth Mover Distance (EMD) loss, we guide the LLM away from generating unsafe responses.
• Score: 18.044879441434432
• License:
• Abstract: Large Language Models (LLMs) generating unsafe responses to toxic prompts is a significant issue in their applications. While various efforts aim to address this safety concern, previous approaches often demand substantial human data collection or rely on the less dependable option of using another LLM to generate corrective data. In this paper, we aim to take this problem and overcome limitations of requiring significant high-quality human data. Our method requires only a small set of unsafe responses to toxic prompts, easily obtained from the unsafe LLM itself. By employing a semantic cost combined with a negative Earth Mover Distance (EMD) loss, we guide the LLM away from generating unsafe responses. Additionally, we propose a novel lower bound for EMD loss, enabling more efficient optimization. Our results demonstrate superior performance and data efficiency compared to baselines, and we further examine the nuanced effects of over-alignment and potential degradation of language capabilities when using contrastive data.

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