Findings of the Counter Turing Test: AI-Generated Text Detection
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Computer Science > Computation and Language
arXiv:2605.20761 (cs)
[Submitted on 20 May 2026]
Title:Findings of the Counter Turing Test: AI-Generated Text Detection
Authors:Rajarshi Roy, Gurpreet Singh, Ashhar Aziz, Shashwat Bajpai, Nasrin Imanpour, Shwetangshu Biswas, Kapil Wanaskar, Parth Patwa, Subhankar Ghosh, Shreyas Dixit, Nilesh Ranjan Pal, Vipula Rawte, Ritvik Garimella, Amitava Das, Amit Sheth, Vasu Sharma, Aishwarya Naresh Reganti, Vinija Jain, Aman Chadha
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Abstract:The rapid proliferation of AI-generated text has introduced significant challenges in maintaining the integrity of digital content. Advanced generative models such as GPT-4, Claude 3.5, and Llama can produce highly coherent and human-like text, making it increasingly difficult to differentiate between human-written and AI-generated content. While these models have transformative applications, their misuse has raised concerns about misinformation, biased narratives, and security threats.
This paper provides a comprehensive analysis of state-of-the-art AI-generated text detection techniques and evaluates their effectiveness through the Counter Turing Test (CT2) shared tasks. Task A (Binary Classification) required participants to distinguish between human-written and AI-generated text, while Task B (Model Attribution) focused on identifying the specific language model responsible for generating a given text. The results demonstrated high performance in binary classification, with the top system achieving an F1 score of 1.0000, but significantly lower scores in model attribution, where the best system achieved 0.9531, highlighting the increased complexity of this task.
The top-performing teams leveraged fine-tuned transformer models, ensemble learning, and hybrid detection approaches, with DeBERTa-based and BART-based methods demonstrating strong results. However, the lower scores in Task B underscore the challenges of distinguishing outputs from different LLMs, necessitating further research into adversarial robustness, feature extraction, and cross-domain generalization.
| Comments: | Defactify4 @AAAI 2025 |
| Subjects: | Computation and Language (cs.CL) |
| Cite as: | arXiv:2605.20761 [cs.CL] |
| (or arXiv:2605.20761v1 [cs.CL] for this version) | |
| https://doi.org/10.48550/arXiv.2605.20761
arXiv-issued DOI via DataCite (pending registration)
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