OpenAI launched GPT-5.6-Cyber for approved defenders; testing showed responses to 95% of advanced cybersecurity-task requests.

OpenAI expanded its Daybreak cybersecurity program and introduced GPT-5.6-Cyber, a model designed for advanced, authorized cybersecurity work. Access to its higher-risk capabilities is limited to approved users and includes additional controls and monitoring.

Daybreak has two disclosed access levels. Daybreak Blue provides GPT-5.6 Sol access without system-level cybersecurity safeguards, while Daybreak Red provides GPT-5.6-Cyber for exploit validation and advanced vulnerability research.

In testing, GPT-5.6-Cyber responded to 95% of advanced cybersecurity-task requests. The cited task categories included exploit-chain development, authentication bypass, and privilege escalation; the percentage measures response coverage for requests, not a 95% success rate at completing or validating the tasks.

OpenAI recommended that Codex Daybreak customers switch from “full access mode” to “automatic review mode” through application defaults and interface controls. It also said all individual Daybreak accounts would be required to use hardware security keys beginning Sept. 1, 2026, and separately stated that GPT-5.6-Cyber was not used in an attack on Hugging Face.