AI RESEARCH
Base Models Look Human To AI Detectors
arXiv CS.AI
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ArXi:2605.19516v1 Announce Type: cross As AI-generated text enters the real-world at scale, institutions increasingly use commercial AI-text detectors, especially in education and academic-integrity workflows. We report a surprising empirical finding about such systems: when evaluated by GPTZero and Pangram, generated text from base models is often judged overwhelmingly human, whereas text generated by their instruction-tuned counterparts is not.