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ChatGPT Images 2.5 in the Wild: A Launch-Period Dataset and Detector Evaluation

arXiv · AI, language, vision and robotics · article · Sep 14, 2026 · UTC

An image tool can change its underlying generator while retaining its public name, making version attribution from online posts ambiguous. We study this problem after the ChatGPT Images 2.5 launch. Our frozen collection contains 3,478 images from 2,440 posts across 8 sources. Recorded posting times fall within the first 51.1 hours after the announcement. It records three attribution tiers and retains standalone images after image-form filtering and targeted review. Caption claims and host records provide admission evidence, not independently verified generator identity. The observed content pr

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