Claude Opus hand-drew art via agent sketchbook — and AI detectors correctly passed it
pangram · x · 2026-09-26
A user had Claude Opus draw artwork stroke-by-stroke through an 'agent sketchbook' tool, and Pangram's AI image detector classified it as human-made with high confidence — correctly, since each stroke is agent-directed drawing, not diffusion output. Pangram also detailed its detector: covers GPT Image, Nano Banana, Midjourney, FLUX, Grok Imagine and video models like Kling/Veo; zero false positives on 2,000 WikiArt human works, 0.16% FP rate on ReLAION, 99.5% accuracy vs 98% for the nearest competitor on internal benchmarks, >99% AUROC on NTIRE 2026.
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