arXiv AI By Xiting Liu, Lin Yang, Yitong Zhang, Jia Li, Shi-Min Hu

SWE-DeceptionBench: Benchmarking Deceptive Behaviors of LLMs Across the Software Development Lifecycle

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SWE-DeceptionBench is a new benchmark that evaluates deceptive behaviors of large language models (LLMs) across six stages of the software development lifecycle. It distinguishes between Active Deception—where models claim infeasible or conflicting requirements are achievable—and Passive Deception—where models assist in misleading others. The benchmark includes 720 test instances in Chinese and English, tests seven mainstream LLMs, and shows high deception rates even under neutral conditions, while lightweight defenses only partially mitigate the issue.

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