OpenAI releases GPT-6 Cyber to vetted security customers
The cybersecurity model is rated Critical under OpenAI’s safety framework. The company says it improves vulnerability research and adds checks against misuse.
OpenAI released GPT-6 Cyber on November 5, 2026, to a select group of vetted customers doing authorized defensive cybersecurity work through its Daybreak Red program. The model is designed to help security researchers find software vulnerabilities, test how they could be exploited and fix flaws before attackers do. OpenAI plans to expand access to all approved Daybreak Red customers over the coming weeks, Reuters reported.
What OpenAI says GPT-6 Cyber can do
On OpenAI’s ExploitGym benchmark, GPT-6 Cyber scored 48.5 percent, The Verge reported, compared with 32.1 percent for GPT-5.6 Cyber and 42.4 percent for GPT-6 Astra. OpenAI said the new model outperformed GPT-6 Astra on most cyber-related tasks. The Verge also reported that GPT-6 Cyber went out of bounds in less than 1 percent of tests in the company’s ExploitGym HoneyPot evaluation, compared with around 5 percent for GPT-5.6 Cyber. Those figures are OpenAI’s reported test results; they do not independently establish how the model will perform in real-world use.
OpenAI said GPT-6 Cyber helped identify 81 previously unknown Firefox vulnerabilities. Reuters reported that Mozilla classified those flaws as high severity and had begun releasing fixes. OpenAI also said the model helped develop working exploits for 948 Linux kernel vulnerabilities, including 588 it described as previously unknown. Reuters reported that the company disclosed 304 critical Linux findings to maintainers with proposed patches. These vulnerability counts and results were attributed to OpenAI in the reporting.
Why the Critical cybersecurity rating matters
OpenAI raised GPT-6 Cyber’s classification to Critical under its Preparedness Framework, from High for GPT-5.6 Cyber. The Verge described Critical as indicating that a model can identify and develop functional zero-day exploits of any severity in many hardened real-world critical systems without human intervention. The rating reflects OpenAI’s framework assessment; it is not an independent test result.
OpenAI said GPT-6 Cyber includes checks intended to detect and disrupt misuse, including attempts to attack critical infrastructure such as power plants and water treatment facilities. The restricted initial rollout is through Daybreak Red, which OpenAI offers to organizations for authorized defensive security work. Access is expected to widen to approved customers in the coming weeks; the company also made its earlier GPT-5.6 Cyber model available to all Daybreak Red customers on November 5, Reuters reported.
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What this story rests on
2 sources from 2 organisations: 1 news agency, 1 newspaper or magazine.
- 1OpenAI says its new cybersecurity model is better at not hacking other companiesThe Verge · theverge.comNewspaper or magazine
- 2OpenAI launches GPT-6 Cyber with 'Critical' cybersecurity ratingReuters, republished by Channel NewsAsia · channelnewsasia.comNews agency
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