Beyond Easy Wins: A Text Hardness-Aware Benchmark for LLM-generated Text Detection

• URL: http://arxiv.org/abs/2507.15286v1
• Date: Mon, 21 Jul 2025 06:37:27 GMT
• Title: Beyond Easy Wins: A Text Hardness-Aware Benchmark for LLM-generated Text Detection
• Authors: Navid Ayoobi, Sadat Shahriar, Arjun Mukherjee,
• Abstract summary: We present a novel evaluation paradigm for AI text detectors that prioritizes real-world and equitable assessment.<n>Our benchmark, SHIELD, addresses these limitations by integrating both reliability and stability factors into a unified evaluation metric.<n>We develop a model-agnostic humanification framework that modifies AI text to more closely resemble human authorship, incorporating a controllable hardness parameter.
• Score: 0.38233569758620056
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We present a novel evaluation paradigm for AI text detectors that prioritizes real-world and equitable assessment. Current approaches predominantly report conventional metrics like AUROC, overlooking that even modest false positive rates constitute a critical impediment to practical deployment of detection systems. Furthermore, real-world deployment necessitates predetermined threshold configuration, making detector stability (i.e. the maintenance of consistent performance across diverse domains and adversarial scenarios), a critical factor. These aspects have been largely ignored in previous research and benchmarks. Our benchmark, SHIELD, addresses these limitations by integrating both reliability and stability factors into a unified evaluation metric designed for practical assessment. Furthermore, we develop a post-hoc, model-agnostic humanification framework that modifies AI text to more closely resemble human authorship, incorporating a controllable hardness parameter. This hardness-aware approach effectively challenges current SOTA zero-shot detection methods in maintaining both reliability and stability. (Data and code: https://github.com/navid-aub/SHIELD-Benchmark)

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