OpenAI said it considered alerting the Royal Canadian Mounted Police months before a deadly school attack in British Columbia.
Its systems had flagged an account linked to Jesse Van Rootselaar for potential violent activity in June last year.
The company reviewed whether the case met its threshold for contacting law enforcement.
It concluded there was no credible or imminent plan for serious harm at that time.
After the shooting, OpenAI voluntarily provided information to investigators.
Police said the 18-year-old killed family members at home before attacking a local school in Tumbler Ridge.
Eight people died before the suspect took their own life.
The victims included a teaching assistant and several students.
OpenAI said it reports users only when there is clear and immediate risk.
The incident has renewed debate about how tech firms assess threats and share data with authorities.
The motive for the attack remains unknown.
The massacre is the deadliest in Canada since the 2020 Nova Scotia killings.
