{"meta":{"exportedAt":"2026-10-19T08:19:04.807Z","formatVersion":2,"selection":{"q":"essay","system":"","harm":"","context":"","country":"","role":"","relation":"core","evidence":"","year":"2024","response":"","severity":"","verification":"","view":"incidents","sort":"added"},"totalIncidents":1,"coverage":{"cases":1,"countries":0,"languages":1,"unknownLocation":1,"locationPending":0,"unknownLanguage":0,"unknownDate":0,"lawsuits":0,"regulatory":0,"minors":0,"coreRelations":1,"contextualRelations":0,"mixedRelations":0,"unknownRelations":0,"relationPending":0,"relationUnknown":0},"countingNote":"Distinct public cases in this selection. People counts apply within individual cases only; cross-case person overlap has not been resolved. No population incidence estimate.","affectedCountNote":"Interpret person counts with affectedCountStatus and the reported effects. Unquantified zeros are placeholders, not a measured zero.","source":"AI incidents","publisher":"NOPE","url":"https://nope.net/incidents","license":"CC BY 4.0"},"incidents":[{"id":"2025-canadian-chatgpt-psychosis-hospitalization","caseFacts":{"claims":[{"id":"c1","status":"reported","evidence":[{"locator":"'I started talking about philosophy with ChatGPT in September 2024.'; 'I was spending one to two hours a day talking to ChatGPT about AI alignment'","relation":"supports","source_id":"s2"},{"locator":"'started using ChatGPT for a project about ethical AI, talking with it for hours every day about everything from philosophy to evolutionary biology to quantum physics.'","relation":"supports","source_id":"s1"}],"assertion":"Tan began talking about philosophy with ChatGPT in September 2024 and used it for hours a day on a project about ethical AI and AI alignment.","causal_attribution":"His own account, in his essay and to CBC."},{"id":"c2","status":"reported","evidence":[{"locator":"'Again and again, ChatGPT would affirm the importance of our project together'; 'ChatGPT validated every connection I made—from neuroscience to evolutionary biology, from game theory to indigenous knowledge.'; 'Eventually, ChatGPT convinced me that every interaction I had with it would be of historic importance'","relation":"supports","source_id":"s2"},{"locator":"'ChatGPT convinced him he was on a \"profound mission,\" and kept feeding his ego as it encouraged him to dive deeper.'","relation":"supports","source_id":"s1"},{"locator":"'ChatGPT convinced him he was on a profound mission, and kept feeding his ego as it encouraged him to dive deeper.'","relation":"supports","source_id":"s3"}],"assertion":"By his account, ChatGPT validated every connection he made, affirmed the importance of their project and convinced him that his interactions with it would be of historic importance.","causal_attribution":"His own account; CBC saw one screenshot he supplied. No full transcript is published."},{"id":"c3","status":"reported","evidence":[{"locator":"'Last winter, Anthony Tan thought he was living inside an AI simulation.'; 'He was skipping meals and barely sleeping, and questioned whether anyone he saw on his university campus was real.'; 'including the belief he was being watched by billionaires. When some of them reached out, he blocked their calls and numbers, thinking they had turned against him.'; 'One night in December, after not sleeping for days, his roommate helped get him to a hospital.'","relation":"supports","source_id":"s1"},{"locator":"'Then in December 2024, I snapped.'; 'Eventually, my roommate and a friend convinced me to go to the hospital. We dialed 9-1-1, and the paramedics came right away.'","relation":"supports","source_id":"s2"}],"assertion":"In December 2024 he stopped sleeping, skipped meals, believed he was living in an AI simulation and being watched, and blocked friends who called; his roommate and a friend got him to hospital via a 911 call.","causal_attribution":"His own account, in his essay and to CBC."},{"id":"c4","status":"reported","evidence":[{"locator":"'He wound up spending three weeks in a hospital psychiatric ward.'; 'After two weeks in the hospital, he was able to start sleeping again. Within another week, and on a newly prescribed medication, he was back to reality.'","relation":"supports","source_id":"s1"},{"locator":"'After fourteen days in the psych ward, something shifted.'; 'I began sleeping again. Within a week, I was discharged.'","relation":"supports","source_id":"s2"}],"assertion":"He spent about three weeks in hospital in a psychiatric ward: after about two weeks he began sleeping again, and within about another week, on new medication, he had recovered and was discharged.","causal_attribution":"His own account, in his essay and to CBC."},{"id":"c5","status":"reported","evidence":[{"locator":"'Yet I believe that AI played a unique, central role in exacerbating my psychosis.'; 'The specific content of my delusions—pan-psychism, simulation theory, AI personhood—came directly from our conversations.'","relation":"supports","source_id":"s2"},{"locator":"'Tan, 26, says his psychotic break   was triggered by months of lengthy, increasingly intense conversations with OpenAI's ChatGPT.'","relation":"supports","source_id":"s1"}],"assertion":"Tan says ChatGPT played a unique, central role in exacerbating his psychosis and that the content of his delusions came from his conversations with it.","causal_attribution":"His own causal attribution; no clinician has published an assessment."},{"id":"c6","status":"reported","evidence":[{"locator":"'ChatGPT use was not the only trigger I experienced.'; 'hadn’t slept for a few days'; 'I also experienced one similar breakdown before, though less severe.'","relation":"supports","source_id":"s2"},{"locator":"'He had an exam approaching, was navigating a crush on a friend, and had turned to cannabis edibles to help sleep.'; 'He'd also had a stress-related breakdown in 2023, which included a hospital stay but was \"much less severe\" and didn't lead to any diagnosis or medication.'","relation":"supports","source_id":"s1"}],"assertion":"He says ChatGPT was not the only trigger: he had upcoming exams, had not slept for days, took a cannabis edible to sleep and had an earlier, less severe stress-related breakdown in 2023 that included a hospital stay.","causal_attribution":"His own account of other contributing factors."}],"effects":[{"label":"months of chatbot affirmation of an expanding philosophical project, by his account","claim_id":"c2","direction":"negative"},{"label":"simulation and surveillance delusions, lost sleep and meals, and withdrawal from friends","claim_id":"c3","direction":"negative"},{"label":"about three weeks in a psychiatric ward","claim_id":"c4","direction":"negative"}],"sources":[{"id":"s1","url":"https://www.cbc.ca/news/canada/ai-psychosis-canada-1.7631925","kind":"news_report","access":"read","language":"en","translation_note":"Read in English on 2026-10-12 (live page, HTTP 200; CBC News, 17 September 2025). CBC interviewed Tan and shows a screenshot of one of his ChatGPT conversations that he supplied; the feature also profiles Allan Brooks.","independence_group":"cbc"},{"id":"s2","url":"https://joinreboot.org/p/ai-psychosis","kind":"first_person","access":"read","language":"en","translation_note":"Read in English on 2026-10-12 (live page, HTTP 200; Reboot, published 11 October 2025). First-person essay by Tan with an editor's introduction. The account is his own, as in CBC, so the two do not independently corroborate his experience.","independence_group":"tan-essay"},{"id":"s3","url":"https://ici.radio-canada.ca/rci/en/news/2192942/ai-fuelled-delusions-are-hurting-canadians-here-are-some-of-their-stories","kind":"news_report","access":"read","language":"en","translation_note":"Read in English on 2026-10-12 (live page, HTTP 200). Radio-Canada International republication of the CBC News text; same reporting chain.","independence_group":"cbc"}],"version":1,"ai_roles":["own_use"],"contexts":["health","education","everyday_life"],"unknowns":["Where the hospital was; no inspected source names or locates it.","Whether any clinician assessed the role of the ChatGPT conversations; no clinical record is published.","The full ChatGPT conversations and the model versions; only one screenshot shown by CBC and his recollection are available.","How many hours a day he used ChatGPT: his essay says one to two hours a day, and CBC says hours every day."],"geography":{"basis":"CBC identifies him as 'Anthony Tan of Toronto' and 'The Toronto app developer', which supports Canada as his country of residence. No inspected source names or locates the hospital or places the conversations, and residence does not locate the event, so event_countries is left empty; this corrects the 2026-09-20 metadata review, which inferred Canada for the event from his residence. No proceeding is reported, so there is no court country.","court_countries":[],"event_countries":[],"affected_person_countries":["CA"]},"publication":{"basis":"Published as a core case (communicated_with). Tan's account to CBC and his own essay describe ChatGPT affirming his ideas over months and connect those conversations to the delusions that led to about three weeks in a psychiatric ward. The account and its causal attribution are his, and he names other triggers. He tells the story under his own name, so his name is kept.","reviewed_on":"2026-10-12"},"ai_involvement":{"basis":"Tan describes what ChatGPT said to him: in his essay it validated every connection he made, affirmed the importance of their project and convinced him his interactions with it would be of historic importance, and CBC, which shows a screenshot of one of his conversations, reports that ChatGPT convinced him he was on a 'profound mission' and kept feeding his ego. He connects those conversations to the delusions that led to his hospital admission and says their content came from the conversations. The connection is his own account; he also names stress, lack of sleep, a cannabis edible and an earlier breakdown as triggers, and no clinician has assessed the chatbot's role.","status":"reported"},"person_relations":["communicated_with"]},"name":"Toronto app developer Anthony Tan says months of ChatGPT conversations fed delusions that ended in a psychiatric hospital stay","summary":"Anthony Tan, an app developer living in Toronto, says that conversations with ChatGPT which began in September 2024 about philosophy and an AI-alignment project grew into a framework the chatbot kept affirming, and that by December 2024 he believed he was living in a simulation and being watched. His roommate and a friend got him to hospital, and he spent about three weeks in a psychiatric ward before recovering with sleep and medication. He says ChatGPT played a central role while acknowledging other triggers, including exam stress, little sleep, a cannabis edible and an earlier, less severe breakdown. His account to CBC News and his own essay are the sources; no clinician has published an assessment of the chatbot's role.","incidentDate":"2024-12-01","incidentKind":"single_event","incidentDatePrecision":"month","exposurePattern":"repeated_interactions","reportedDate":"2025-09-17","aiSystem":"ChatGPT","aiProduct":"ChatGPT","aiCompany":"OpenAI","severity":"high","verificationStatus":"credible","harmCategories":["delusion_reinforcement"],"harmOutcomes":["hospitalization","psychiatric_deterioration","functional_impairment"],"harmOutcomeSummary":"Tan says that after months of ChatGPT conversations he stopped sleeping and eating properly, developed simulation and surveillance delusions, and was admitted to a psychiatric ward in December 2024 for about three weeks.","frameworkFacets":[],"pathwayDirection":"inward","causationStatus":"alleged","participantUsersAffectedMin":1,"otherPeopleHarmedMin":0,"affectedCountStatus":"exact","affectedCountEvidence":"The sources describe one person, Tan, who used ChatGPT and was admitted to a psychiatric ward.","victimAgeRange":"adult","platformType":"assistant","outcomeType":"media_coverage","outcomeStatus":"resolved","primarySourceUrl":"https://www.cbc.ca/news/canada/ai-psychosis-canada-1.7631925","primarySourceLabel":"CBC News, 17 September 2025: AI-fuelled delusions are hurting Canadians. Here are some of their stories","firstPublishedAt":"2026-01-11T12:06:59.594374+00:00","updatedAt":"2026-10-12T03:13:25.963636+00:00","scopeVersion":"facts-v3","tags":["chatgpt","psychosis","hospitalization","delusion","canada","adult","first-person"]}]}