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Xin-Yuan Qian

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Preprint Sep 2026

FragToken: Amplifying LLM Inference Costs through Noncanonical Token Generation

As large language model (LLM) inference becomes increasingly expensive, resource-consumption attacks pose a growing threat to model providers. Existing attacks typically amplify cost by inducing abnormally long or repetitive outputs on attacker-controlled or triggered requests, making them easier to detect and limiting...

Zi-Han Wang, Rui Zhang, Xin-Yuan Qian et al. · 0 citations