OpenAI releases GPT-6 Cyber: 48.5% on ExploitGym (32.1% for GPT-5.6 Cyber), available only to approved Daybreak Red customers
A cybersecurity model that goes as far as building working exploits arrived, behind approval.
On 5 November OpenAI announced GPT-6 Cyber. On ExploitGym, which tests whether a model can exploit a specified vulnerability on a remote target, it scores 48.5%, about 16 points above GPT-5.6 Cyber's 32.1%. On an evaluation of staying within scope (ExploitGym Honeypot), it avoided exploiting out-of-scope services in 99.93% of cases without a deployment safety prompt (94.49% for GPT-5.6 Cyber) and 100% with one. OpenAI classifies the model as "Critical" in cybersecurity under its Preparedness Framework (GPT-5.6 Cyber was "High"). As results, it says that in Linux the model reproduced 1,724 vulnerabilities and OpenAI developed working exploits for 948 (166 for GPT-5.6 Sol), and in Firefox it found 81 previously unknown high-severity vulnerabilities. Access starts through the API and Codex for a select group of approved Daybreak Red customers, with a wider rollout to all Daybreak Red customers planned soon. Daybreak Red API access requires an IP allowlist by default. OpenAI also says its researchers used the model to develop and validate exploits for a flaw in a compression library used by Node.js and other software (Brotli), showing remote code execution in downstream applications; the page body does not name a CVE.
Every figure here is OpenAI's own evaluation and report; we could not confirm any independent reproduction. It is also not a model ordinary developers can use today. Still, OpenAI writes that there is "a limited window to use frontier models to secure software" and names Linux, Firefox and a Node.js-related compression library among the findings, which is a reason for anyone running servers not to postpone updates.
