Wikipedia volunteers hunt AI-written articles as rules tighten
Original title: Wikipedia's Cleanup of AI-Generated Content
Pangram flagged about 15 to 16 percent of new English Wikipedia articles in early 2026, down from about 20 percent in late 2025.
WikiProject AI Cleanup, started in 2023, looks for machine-written Wikipedia text that breaks site rules. English Wikipedia now bars editors from using LLMs to generate articles. Founding editor Ellia Lebleu said detection is harder as clichés fade, and fake or mismatched citations are a major problem. Volunteers and the Wikimedia Foundation are testing source-checking and paste-detection tools, while Lebleu said it is too early to know whether the writing ban is working.
Unconfirmed: Lebleu said it is unclear whether the drop in flagged articles reflects the new policy or detectors lagging newer models.
- Lebleu said obvious ChatGPT phrasing was easy to spot in late 2023.
- Her Pangram test found no false positives on pre-ChatGPT Wikipedia text.
- An editor built an AI verifier that checks whether citations support claims.
- Wikimedia’s Paste Check can flag text pasted from some AI chatbots.
- Lebleu said most AI-written submissions come from beginner editors.
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- WikipediaPaste Check
From the original article
5 min read at spectrum.ieee.org
Ellia Lebleu is a founding member of the WikiProject AI Cleanup , a volunteer effort launched in 2023 to find and remove AI-generated material from Wikipedia that breaks the website’s guidelines. When the cleanup began, AI writing was often betrayed by conspicuous clichés.
By rbanffy · spectrum.ieee.org
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