Preprint
Aug 2026
Once a Response, Always a Response: Detecting LLM-generated Text via Latent Prompt Restoration
EchoPrompt is proposed, a training-free detector based on latent prompt restoration that achieves state-of-the-art performance among zero-shot detectors while maintaining strong robustness across challenging evaluation settings.
Hongrui Bao, Yubing Ren, Yanan Cao et al.
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