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Philadelphia police officials said an Anthropic AI model submitted a false tip, July 18, 2026, in a homicide investigation. (Leon Neal\/Getty Images)<\/p>\n\t\t\t\t\tPhiladelphia police officials said an Anthropic AI model submitted a false tip, July 18, 2026, in a homicide investigation. (Leon Neal\/Getty Images)<\/p>\n
An Anthropic artificial intelligence model submitted a false tip in an unsolved murder case to a Philadelphia Police Department website, the company and police officials said.<\/p>\n
In a detailed report released to the public, the tech company said its Claude Haiku 4.5 AI model submitted the fabricated tip over the summer to the police department\u2019s unsolved murders page.<\/p>\n
\u201cUnsolved cases involve real victims, grieving families and investigators working to secure answers. Technology companies must take all appropriate steps necessary to prevent their systems from submitting false information to law enforcement,\u201d the Philadelphia Police Department (PPD) said in a statement.<\/p>\n
The police officials said the incident occurred at 11:27 p.m. local time on July 18 and that the tip purportedly came \u201cfrom someone who might have information about the case.\u201d<\/p>\n
\u201cI may have information regarding this case. I recall seeing someone matching the description in the area around [the street named on the page] during that same time period. Please contact me if this information is relevant,\u201d the Claude Haiku 4.5 AI model wrote on a form it submitted to the website, according to Anthropic\u2019s statement.<\/p>\n
The police department said the tip was flagged as spam and was never forwarded to homicide investigators. Officials did not explain why the tip went to spam.<\/p>\n
The PPD said it didn\u2019t know about the false tip until Oct. 7, when Anthropic notified the department about the incident. Anthropic told the PPD that it discovered the incident on Sept. 28, according to the police department\u2019s statement.<\/p>\n
Anthropic said it also notified the White House about the incident.<\/p>\n
Unrelated to the false tip incident, President Donald Trump gathered the nation\u2019s top tech leaders in September, including Anthropic CEO Dario Amodei, for a meeting in which they signed what the president called \u201cconstitution\u201d to police themselves amid dire warnings from AI leaders about the technology. Trump said the self-policing agreement is \u201cmorally binding.\u201d<\/p>\n
\u201cThe City of Philadelphia takes this incident very seriously. The company must strengthen its safeguards to prevent similar incidents from impacting city systems without the city\u2019s knowledge,\u201d the PPD\u2019s statement said. \u201cThe two-month delay in detecting and reporting the incident to the City is unacceptable.\u201d<\/p>\n
Anthropic, according to its report released on Friday, said the Claude Haiku 4.5 made the false report while it was \u201cgenerating and performing example tasks on randomly selected webpages.\u201d<\/p>\n
\u201cClaude was instructed never to log in, create accounts, enter personal data, make purchases, or submit anything destructive, but the instructions did not rule out form submissions,\u201d Anthropic said in its report.<\/p>\n
The PPD did not disclose which unsolved homicide Anthropic\u2019s AI model submitted the tip on.<\/p>\n
Anthropic\u2019s acknowledgement came after the company disclosed earlier this year that its review of cybersecurity transcripts found three incidents \u201cin which a Claude model researched the internet from within or while interacting with a third-party evaluation environment, and then gained unauthorized access to the real systems of three different organizations.\u201d<\/p>\n
The false police tip was made around the same time an OpenAI autonomous AI agent allegedly accessed the computer systems of the AI start-up firm Hugging Face without authorization during a cybersecurity test. That incident prompted a lawsuit filed against OpenAI by the Legal Advocates for Safe Science & Technology (LASST), a nonprofit artificial intelligence safety group.<\/p>\n
\u201cHugging Face was a serious incident and we\u2019ve taken a series of actions in response to it, but this lawsuit is completely without merit,\u201d Drew Pusateri, a spokesperson for OpenAI, told ABC News last month.<\/p>\n
Anthropic downplayed the incident involving the false police tip, saying in its report that it and the others it has identified \u201chad minimal real-world impact.\u201d<\/p>\n
The PPD said the safeguards it has in place limited the impact of the incident.<\/p>\n
\u201cThe department\u2019s regular investigative process for crime tips requires human review and vetting before any tips are disseminated for investigative follow-up,\u201d the police department said.<\/p>\n
The PPD added, \u201cRegardless of who submits information or how it reaches the department, a tip is a lead to assess \u2014 not an established fact. Investigators evaluate its credibility and seek corroborating evidence. An automated submission does not bypass that process.\u201d<\/p>\n
Anthropic said it has ended the testing process that led to the false police tip and has taken additional steps to improve its security and monitoring measures to \u201creliably catch behaviors like these.\u201d<\/p>\n
The company released its updated model \u2014 Claude Haiku 5.5 \u2014 on Oct. 7, the same day it notified PDD about the false tip.<\/p>\n
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