OpenAI considered notifying Canadian police about a user later linked to a mass school shooting.
The company flagged the account in June for “furtherance of violent activities”.
It reviewed whether to contact the Royal Canadian Mounted Police but decided the activity did not show an imminent or credible threat.
Its policy requires clear evidence of serious, immediate risk before a referral.
Months later, 18-year-old Jesse Van Rootselaar killed eight people in a remote British Columbia community and died by suicide.
Police said the victims included a teaching assistant and several students aged 12 and 13.
The attacker had previous mental-health-related contact with authorities.
After the shooting, OpenAI proactively shared information about the account with investigators.
The motive for the attack remains unclear.
The case has renewed debate about when technology companies should alert law enforcement.
OpenAI said it will continue cooperating with the investigation and expressed sympathy for the victims.
