[goyaladitya05]

This adds the aicheck v5r detector to the RAID leaderboard.

Files:

• leaderboard/submissions/aicheck-v5r/predictions.json (672,000 predictions on the full test set, including adversarial attacks)
• leaderboard/submissions/aicheck-v5r/metadata.json

About the detector:

• A ModernBERT-base classifier (max length 1024 tokens), fine-tuned for AI-generated text detection.
• Training data includes the RAID train split.
• Before scoring, the input text goes through a light character cleanup: zero-width characters are removed, and Cyrillic or Greek look-alike letters inside otherwise Latin words are mapped back to Latin.
• Scores are raw log-odds that the text is machine generated (higher means more likely machine).

Contact: goyaladitya2403@gmail.com