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Binary human vs. AI classification on NarraBench (test)
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99.9
Macro F1 Score
ModernBERT
54.14
66.02
77.9
89.78
Apr 3, 2026
Macro F1 Score
AUPRC
Updated 13d ago
Evaluation Results
Method
Method
Links
Macro F1 Score
AUPRC
ModernBERT
2026.04
99.9
100
Stylometric+XGB
Size=144
2026.04
99.8
99.9
TF-IDF+XGB
Size=5,000
2026.04
99.7
99.9
Narr. + Style
Size=304
2026.04
96
98.2
Narrative
Size=257
2026.04
93.2
95.9
Core+FP
Size=101
2026.04
91.1
93.4
Style Only
Size=39
2026.04
85.8
86.7
Core Only
Size=30
2026.04
84.8
82.8
Binoculars
2026.04
55.9
40.4
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