OpenAI discloses and blocks coordinated model-distillation attack
What happened
On September 30, 2026, OpenAI disclosed and blocked a coordinated model-distillation attack in a first-hand report. According to OpenAI, the activity began in the first week of July, with attackers trying to extract protected reasoning content from its models. High-traffic peaks came on July 24 and 25, involving 16,000 requests from more than 4,000 users; the related prompt-pattern activity involved over 15,000 users. OpenAI says it fully blocked the operation by July 28.
Written by AI from the coverage · updated 59 minutes ago
Coverage
Follow the reports to see the story from different sides.
- OpenAI NewsPickOpenAI says it detected and blocked a coordinated model-distillation attack
OpenAI says it found and blocked a coordinated distillation attack that first appeared in the first week of July, with attackers trying to extract protected reasoning from its models. Peaks came on July 24 and 25: 16,000 requests from more than 4,000 users, with prompt-pattern activity tied to over 15,000 users. OpenAI says it fully blocked the activity by July 28.
Heat over time
Not enough continuous observations to draw a trend yet.