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Safety Tax: Safety Alignment Makes Your Large Reasoning Models Less Reasonable

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arxiv 2503.00555 v2 pith:EUIE5JDL submitted 2025-03-01 cs.CR cs.AIcs.LG

Safety Tax: Safety Alignment Makes Your Large Reasoning Models Less Reasonable

classification cs.CR cs.AIcs.LG
keywords safetyalignmentlrmsreasoningcapabilitylargedatasetfindings
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Safety alignment is an important procedure before the official deployment of a Large Language Model (LLM). While safety alignment has been extensively studied for LLM, there is still a large research gap for Large Reasoning Models (LRMs) that equip with improved reasoning capability. We in this paper systematically examine a simplified pipeline for producing safety aligned LRMs. With our evaluation of various LRMs, we deliver two main findings: i) Safety alignment can be done upon the LRM to restore its safety capability. ii) Safety alignment leads to a degradation of the reasoning capability of LRMs. The two findings show that there exists a trade-off between reasoning and safety capability with the sequential LRM production pipeline. The discovered trade-off, which we name Safety Tax, should shed light on future endeavors of safety research on LRMs. As a by-product, we curate a dataset called DirectRefusal, which might serve as an alternative dataset for safety alignment. Our source code is available at https://github.com/git-disl/Safety-Tax.

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