On Nov. 5, 2026 OpenAI said it is introducing GPT-6 Cyber, initially through the API and Codex for a select group of approved Daybreak Red customers, with wider Daybreak Red access planned later. OpenAI rates the model Critical for cybersecurity under its Preparedness Framework, up from High for GPT-5.6 Cyber, and says it scored 48.5 percent on ExploitGym versus 32.1 percent for GPT-5.6 Cyber. OpenAI says the model found 81 novel Firefox flaws that Mozilla classified as high severity, with fixes beginning to land, and that it disclosed 304 critical Linux findings with candidate patches. Those counts and the Critical label are OpenAI's account.
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