OpenAI said it considered alerting Canadian authorities about a user months before a deadly school attack.
The company had flagged the account of Jesse Van Rootselaar in June for activity linked to potential violence.
The firm reviewed whether to contact the Royal Canadian Mounted Police.
It decided the case did not meet its threshold for referral.
That standard requires evidence of an imminent and credible risk of serious harm.
Last week the 18-year-old killed eight people in Tumbler Ridge before taking her own life.
Police said the victims included a teaching assistant and five students aged 12 to 13.
She had previously had mental-health-related contact with officers.
After the attack, OpenAI proactively shared information with investigators.
The company said it had not identified concrete planning at the time of the earlier review.
The motive remains unclear.
The massacre is Canada’s deadliest since the 2020 Nova Scotia killings.
