Anywhere from a few days to a year or more, depending on where the AI got its answer. More and more AI tools look up current web pages before answering, and Wikipedia is one of the pages they check most. When that happens, a corrected article can show up in answers within days. But the same tools also answer from what they learned when they were built, and a fact learned that way sticks around until the company behind the tool releases a new version, which can take months. So a correction can appear in one tool this week and not in another until its next release.
Google runs on its own schedule too: Knowledge Panels usually update days to weeks after the underlying source is fixed. Set expectations accordingly. Search results and tools that look things up will catch up first, answers based on older training will follow as new versions come out, and there won't be a single day when the old fact disappears everywhere.
What matters most is that the fix keeps paying off. Every tool that reads Wikipedia from now on gets the corrected version, which is the best argument for fixing things now rather than waiting until they cause trouble.
Last updated September 27, 2026.
