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Pangram Labs released Pangram 4, an AI text classifier that detects whether text was written by humans or AI systems. The model achieves 99.16% accuracy and can now identify mixed human-AI writing and fine-grained edits better than its predecessor.
- AUROC of 0.9916 with 0.0041% false positive rate and 0.3396% false negative rate
- Can distinguish fine-grained edits and detect interleaved AI assistance in co-authored text
- Shows improved robustness to adversarial attacks and better generalization to out-of-distribution data