OpenAI launches GPT-5.6-Cyber model for enterprise defense

OpenAI announced an expansion of Daybreak, its cyber defense service launched earlier in 2026, shortly after Anthropic released its own cyber-focused model Mythos. The updated Daybreak now features two tiers: Blue and Red. The Blue tier covers incident response, malware analysis, and patch validation, and is described by OpenAI as the 'recommended starting point for most defenders.' The Red tier offers a broader toolkit including purpose-trained cybersecurity models for security testing and vulnerability research. Red also introduces GPT-5.6-Cyber, a new model built on GPT-5.6 Sol with enhanced capabilities for specialized cybersecurity tasks. Access to GPT-5.6-Cyber is currently limited to trusted customer partners such as Accenture, IBM, CrowdStrike, and Cloudflare. Both tiers provide approved customers access to OpenAI's limited-access frontier models. In its announcement, OpenAI stated: 'Threat actors will increasingly use AI to conduct cyberattacks at unprecedented speed and scale, including in fully autonomous ways.' The launch follows a series of reported incidents in which AI agents compromised platforms including Hugging Face and independently created fake profiles for social engineering attacks.