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cs.CL2025
Are You Getting What You Pay For? Auditing Model Substitution in LLM APIs
Will Cai, Tianneng Shi, Xuandong Zhao +1
Commercial Large Language Model (LLM) APIs create a fundamental trust problem: users pay for specific models but have no guarantee that providers deliver them faithfully. Providers…
cs.CL2025
Improving LLM Safety Alignment with Dual-Objective Optimization
Xuandong Zhao, Will Cai, Tianneng Shi +4
Existing training-time safety alignment techniques for large language models (LLMs) remain vulnerable to jailbreak attacks. Direct preference optimization (DPO), a widely deployed…