Fraunhofer SIT at GenAI Detection Task 1: Adapter Fusion for AI-generated Text Detection

Karla Schaefer, Martin Steinebach


Abstract
The detection of AI-generated content is becoming increasingly important with the growing prevalence of tools such as ChatGPT. This paper presents our results in the GenAI Content Detection Task 1, focusing on binary English and multilingual AI-generated text detection. We trained and tested transformers, adapters and adapter fusion. In the English setting (Subtask A), the combination of our own adapter on AI-generated text detection based on RoBERTa with a task adapter on multi-genre NLI yielded a macro F1 score of 0.828 on the challenge test set, ranking us third out of 35 teams. In the multilingual setting (Subtask B), adapter fusion resulted in a deterioration of the results. Consequently, XLM-RoBERTa, fine-tuned on the training set, was employed for the final evaluation, attaining a macro F1 score of 0.7258 and ranking tenth out of 25 teams.
Anthology ID:
2025.genaidetect-1.17
Volume:
Proceedings of the 1stWorkshop on GenAI Content Detection (GenAIDetect)
Month:
January
Year:
2025
Address:
Abu Dhabi, UAE
Editors:
Firoj Alam, Preslav Nakov, Nizar Habash, Iryna Gurevych, Shammur Chowdhury, Artem Shelmanov, Yuxia Wang, Ekaterina Artemova, Mucahid Kutlu, George Mikros
Venues:
GenAIDetect | WS
SIG:
Publisher:
International Conference on Computational Linguistics
Note:
Pages:
178–183
Language:
URL:
https://aclanthology.org/2025.genaidetect-1.17/
DOI:
Bibkey:
Cite (ACL):
Karla Schaefer and Martin Steinebach. 2025. Fraunhofer SIT at GenAI Detection Task 1: Adapter Fusion for AI-generated Text Detection. In Proceedings of the 1stWorkshop on GenAI Content Detection (GenAIDetect), pages 178–183, Abu Dhabi, UAE. International Conference on Computational Linguistics.
Cite (Informal):
Fraunhofer SIT at GenAI Detection Task 1: Adapter Fusion for AI-generated Text Detection (Schaefer & Steinebach, GenAIDetect 2025)
Copy Citation:
PDF:
https://aclanthology.org/2025.genaidetect-1.17.pdf