What changed: According to ShiftDelete and The Decoder, OpenAI unveiled GPT-6 Cyber, a model trained for security research. It scored 48.5% on ExploitGym versus 32.1% for GPT-5.6 Cyber, found 81 previously unknown high-severity Firefox vulnerabilities, and built working exploits for 948 Linux kernel flaws. OpenAI rates the model's cybersecurity risk as Critical under its Preparedness Framework.
Who is affected
The sources say access is currently limited to select Daybreak Red customers; businesses running Firefox or Linux-based systems are affected indirectly through the patches already released.
What it means for your business
For businesses running Firefox or Linux-based servers, this means the critical flaws GPT-6 Cyber uncovered are now patched, and delaying updates leaves known vulnerabilities exposed.
What to do
Update Firefox and any Linux-based systems to the latest version now, and follow Mozilla's patch notes for the vulnerabilities GPT-6 Cyber reported.
When it takes effect
OpenAI announced the model on November 5, 2026, with Firefox patches already shipped; the sources give no exact date for expanding access to all Daybreak Red customers.
Source (press reports): ShiftDelete, The Decoder
