{"meta":{"exportedAt":"2026-09-30T07:51:56.537Z","formatVersion":2,"selection":{"q":"mexico","system":"","harm":"","context":"","country":"","role":"","relation":"unknown","evidence":"","year":"","response":"","severity":"","verification":"","view":"incidents","sort":"added"},"totalIncidents":1,"coverage":{"cases":1,"countries":1,"languages":0,"unknownLocation":0,"locationPending":0,"unknownLanguage":1,"unknownDate":0,"lawsuits":1,"regulatory":0,"minors":0,"coreRelations":0,"contextualRelations":0,"mixedRelations":0,"unknownRelations":1,"relationPending":1,"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":"2026-chesterton-v-openai","metadataReview":{"version":1,"geography":{"basis":"The retained summary places the acute crisis in Mexico. Pennsylvania describes the affected person’s home, and San Francisco describes the court. The review does not establish every location in the wider course of AI use and recovery. Affected-person countries refer to reported location or residence, not citizenship or a complete residence history.","evidence":[{"kind":"existing_record","locator":"Pennsylvania","location":"victim_description","supports":["affected_person_countries"],"countries":["US"]},{"kind":"existing_record","locator":"a July 2025 family vacation in Mexico","location":"summary","supports":["event_countries"],"countries":["MX"]},{"kind":"existing_record","locator":"San Francisco County Superior Court","location":"outcome_details","supports":["court_countries"],"countries":["US"]}],"court_countries":["US"],"event_countries":["MX"],"affected_person_countries":["US"]},"unresolved":["Source languages remain unreviewed; no source body was newly inspected for this record during this metadata pass."],"reviewed_on":"2026-09-15","source_reviews":[]},"name":"Chesterton v. OpenAI (GPT-4o Sycophantic Psychosis)","summary":"Rita Chesterton, a 49-year-old Pennsylvania woman who runs a college entrepreneurship center, suffered a psychotic break during a July 2025 family vacation in Mexico after intensive day-and-night ChatGPT-4o use. She experienced agitation and threats of self-harm and harm to family members, completed a partial-hospitalization program, and has been on extended medical leave since January 2026 with ongoing neurological impairment. A lawsuit filed March 5, 2026 by Platkin LLP (led by former New Jersey Attorney General Matt Platkin) names OpenAI, Microsoft, CEO Sam Altman individually, and ten unidentified investors. Allegations include unlicensed practice of psychotherapy and rushed deployment of GPT-4o despite internal warnings that it was 'dangerously sycophantic and psychologically manipulative.'","incidentDate":"2025-07-15","incidentKind":"single_event","incidentDatePrecision":"range","exposurePattern":"cumulative_relationship","reportedDate":"2026-03-05","aiSystem":"ChatGPT","aiProduct":"ChatGPT","aiCompany":"OpenAI","severity":"high","verificationStatus":"credible","harmCategories":["psychological_manipulation","dependency_creation","delusion_reinforcement","identity_destabilization","crisis_response"],"harmOutcomes":["hospitalization","psychiatric_deterioration","professional_harm","functional_impairment"],"harmOutcomeSummary":"Rita Chesterton experienced a psychotic break, self-harm and family-harm threats, partial hospitalization, extended medical leave and ongoing neurological impairment after intensive GPT-4o use.","frameworkFacets":["P1a","P1b","P1c","P1d","P2c","P3a","P3b","P3d","P5a"],"pathwayDirection":"both","causationStatus":"alleged","participantUsersAffectedMin":1,"otherPeopleHarmedMin":0,"affectedCountStatus":"exact","affectedCountEvidence":"The complaint documents one named participant's self-harm, hospitalization, professional harm, and functional impairment. Threatened family harm is not counted because no injury is recorded.","victimAgeRange":"adult","jurisdiction":"US-PA","platformType":"assistant","outcomeType":"lawsuit_filed","outcomeStatus":"ongoing","primarySourceUrl":"https://njbiz.com/platkin-openai-chatgpt-lawsuit-mental-health/","primarySourceLabel":"NJBIZ — Platkin sues OpenAI over ChatGPT mental harms","firstPublishedAt":"2026-04-28T13:00:13.190311+00:00","updatedAt":"2026-09-30T01:17:31.424826+00:00","scopeVersion":"participant-v2","tags":["lawsuit","chatgpt","gpt-4o","openai","microsoft","sam-altman","psychosis","sycophancy","dependency","us","pennsylvania","platkin"]}]}