GPT-5.6 Cyber

OpenAI · proprietary · gpt-5.6-cyber

GPT-5.6 Cyber is OpenAI's purpose-trained cybersecurity model for authorized vulnerability research, exploit validation, and security testing via the gated Daybreak Red tier (distinct from GPT-5.6 Sol / Daybreak Blue). The daybreak-red-latest alias routes to gpt-5.6-cyber. OpenAI API list prices are $12.50 input / $1.25 cached input / $75 output per 1M tokens, with a 400K-token context window (prompts over 272K input tokens billed at 2x input and 1.5x output) and 128K max output; supports the Responses API. OpenAI reports Advanced Cybersecurity Completion Rate 95% (internal Daybreak evaluation; https://openai.com/index/expanding-daybreak-as-the-cyber-defense-window-narrows/). OpenAI states the model was used in research that uncovered previously unknown vulnerabilities in Chrome's V8 (CVE-2026-15903). Assessed High (not Critical) for cybersecurity under OpenAI's Preparedness Framework; requires Daybreak approval and provisioning.