Wikipedia's English-language edition voted on March 20 to ban all AI-generated text from its 7.1 million articles, drawing one of the clearest lines yet between human-authored knowledge and machine-generated content.

The vote wasn't close. Volunteer editors approved the ban 44–2 after a Request for Comment process driven by mounting frustration over what editors called the "asymmetry of effort": it takes seconds to generate hallucinated, citation-free AI text and hours for human editors to fact-check and remove it. "One person can generate AI text in five seconds and post it on Wikipedia," said Ilyas Lebleu, a French AI research student who drafted the winning proposal under the username Chaotic Enby. "We can spend an hour or longer verifying everything."

The ban covers new and existing articles. Editors may still use AI tools for basic copyediting — provided the AI introduces no new content and a human reviews the changes — and for translating articles from other language editions, so long as the editor can verify accuracy in the source language. Everything else is off.

The decision formalizes what Wikipedia's volunteer editors had been fighting to enforce informally since ChatGPT's 2022 launch. The signs of AI infiltration were not subtle: articles with placeholder prompts still embedded in the text, fabricated citations, and the telltale phrase "rich cultural heritage." A WikiProject called "AI Cleanup" emerged to catalog detection techniques. Editors developed a public guide to spotting AI writing so precise that contributors can sometimes identify which model version generated a passage based on its training cutoff.

One complication: false positives. Some editors raised concerns that autistic contributors or non-native English speakers could be wrongly flagged for writing in an "AI-like" style. Lebleu addressed this in the final policy, explicitly prohibiting sanctions based on writing style alone.

German Wikipedia implemented similar restrictions in February 2026. English Wikipedia's adoption — the largest and most-linked edition — gives the policy global weight.

What Wikipedia has established is a principle other platforms have so far avoided: the source of the text matters, not just its accuracy. Whether Google, news publishers, or social platforms follow is an open question. But Wikipedia has at least made the position legible.

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