GPT-5.6-Cyber
OpenAI · Released Aug 2026
GPT-5.6-Cyber is OpenAI's purpose-trained cybersecurity model, built on GPT-5.6 Sol and available exclusively through the gated Daybreak Red program. It is the first model to reach OpenAI's 'High' cyber capability threshold under its Preparedness Framework, with exploit-chain and zero-day performance that far exceeds general-purpose models. Reach for it if you are an authorized red team or vulnerability researcher; everyone else should use GPT-5.6 Sol via Daybreak Blue.
Is it right for you?
Good for
- Zero-day vulnerability discovery — found 2 previously unknown Chrome V8 flaws and 400+ possible privilege-escalation flaws in a major OS kernel
- Exploit-chain development — 95% completion rate on advanced cybersecurity tasks vs 1.5% for GPT-5.6 Sol
- Authorized red teaming, penetration testing, and exploit validation in gated environments
Not good for
- General-purpose coding or reasoning — it is purpose-trained for cybersecurity and produces shorter, less detailed vulnerability reports than GPT-5.6 Sol
- Anyone without Daybreak Red approval — access requires identity verification, legal attestations, and hardware security keys
How it performs by task
Vulnerability discovery
Best-in-class for zero-day hunting; found real Chrome and database vulnerabilities in internal testing
Exploit development
95% completion rate on advanced exploit requests; produced working WebSocket auth bypass code where every other model refused
General reasoning
Built on GPT-5.6 Sol but fine-tuned for cyber tasks — shorter reports, less detailed than base Sol on general vulnerability writing
Code generation
Strong for exploit code but not a general coding model; uses more tokens and produces less polished output than Sol
Pricing
Input
$12.50 / 1M tokens
Output
$75 / 1M tokens
Context
400K tokens
Benchmarks
No verdict changes yet
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Sources
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