GPT-5.6-Cyber

OpenAI's cybersecurity-specific model, available only to defenders vetted into the new Daybreak Red access tier.

Built on GPT-5.6 Sol and trained on specialized cybersecurity tasks including finding zero-day vulnerabilities and developing exploit chains
Refuses far less on higher-risk dual-use requests: it completed 95% of advanced test requests covering exploit chains, authentication bypasses, and privilege escalation, against 57.3% for GPT-5.5-Cyber and 1.5% for GPT-5.6 Sol under normal safeguards
OpenAI split Daybreak into two tiers. Daybreak Blue gives approved defenders general-purpose models like GPT-5.6 Sol for vulnerability discovery, secure code review, malware analysis, and incident response. Daybreak Red gates the purpose-trained cyber models behind tighter vetting
Access requires approval into Daybreak Red. There is no self-serve or public option
OpenAI used the model to find two previously unknown vulnerabilities in Chrome's V8 engine that could be chained to escape its sandbox

Authorized vulnerability research, exploit validation, and security testing inside an approved security team.

You are a vetted defender who needs a model that engages with dual-use security work instead of refusing it.

Security researchers and red teams at organizations approved into OpenAI's Daybreak program.

Join the newsletter to get ahead with AI.

I share strategies, new modules, free guides, and tools to get you better at using AI in your work.