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3 days ago
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Stronger AI detector: two more paraphrase-robust models averaged into the score
unknown +1: Claude Opus 5.5Nine public detectors were tested (devtools/compare_detectors.py) on 18 AI-written academic samples, 21 human abstracts from 2008 and 16 paragraphs our humanizer had rewritten. Added: ShantanuT01/vanguard-ai-text-detector (ModernBERT-large, MIT) and Oxidane/tmr-ai-text-detector (RoBERTa, MIT). The final score is the mean of the previous ensemble and the two: AI 18/18, human 0/21, humanized 11/16 flagged (was 6/16). Rejected: PirateXX (flagged every human text), AICodexLab ModernBERT (18/21 human), desklib academic (13/21), econ-distilroberta (7/21), vraj33 (flagged nothing). DETECTOR_EXTRA sets the extra models ("" = none). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>dc37bdf
4 days ago
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Stronger AI detector: paraphrase-robust third model in the ensemble
unknown +1: Claude Opus 5.5fakespot-ai/roberta-base-ai-text-detection-v1 averaged with the current coai + desklib score. Measured (devtools/compare_detectors.py): AI samples 18/18 flagged, human abstracts from 2008 0/21, paragraphs our own humanizer had brought to 6%: 6/16 flagged (was 1/16). RADAR was tested and rejected (separation 0.72 on academic text). DETECTOR_MODEL3="" turns it off; DETECTOR_WEIGHT3 sets its share (0.5). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>eebf465 -
Fast engine (opt-in with ?engine=fast) and one-step document upload
unknown +1: Claude Opus 5.5- fast.py: the whole document at once. The detector reads it once; every flagged sentence is rewritten in parallel by the language model (keep-every-detail prompt); versions must keep terms / numbers / citations, the meaning (embeddings + an independent faithfulness reading) and read as fluent English; the detector picks the most human version in context. Rounds repeat on what is still flagged within a time budget (FAST_BUDGET, 50 s). Live engine unchanged unless SMART_ENGINE=fast or the page is opened with ?engine=fast. - Smart Humanize opens on the Word upload, and dropping a file starts the run; the separate Humanizer tab is hidden. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>4a7a056