An AI-generated photograph shared as "Vintage Toronto" on Facebook claims to show a real event: a Greek Orthodox Good Friday procession on Toronto's Danforth Avenue in 1974. The image gained more than 1,000 likes despite containing clear factual errors — the procession is shown in broad daylight even though the only Good Friday procession in the Greek Orthodox tradition takes place in the evening, the Danforth Music Hall exterior is falsified, and a banner reading "Greek Easter 1974 — Danforth" hangs across a street in a way that never occurred. The account presents this AI image as an authentic historical record of the city's Greek community.

ChatGPT repeatedly told a writer researching Black history that well-documented events never happened. It insisted the Trump administration's destruction of multiple boats was not real — even though it had been in the news since at least September — and it adamantly denied that Monticello tours ever featured Black people dressed as enslaved people, citing the estate's official stance. The practice was documented in oral histories including Clint Smith's 'How the Word is Passed.'

Gemini Pro told a historian that Setsuko S., a 16-year-old Japanese diarist, was a typist working for a company in Saipan, then produced several paragraphs about civilian experience in the Battle of Saipan purportedly summarizing her diary but in fact concocted from other sources. ChatGPT provided several lines of false direct quotation from the diary. Both chatbots elaborated further on their fabrications when asked for sources. Only DeepSeek acknowledged that no widely known public records exist - the correct answer.