OpenAI Daybreak — GPT-5.5-Cyber, Codex Security, and the Agentic Defense Stack

OpenAI Daybreak (May 2026) is an agentic cybersecurity platform built on GPT-5.5, Codex Security, and a tiered access system for defensive security teams. Codex Security autonomously builds threat models, identifies vulnerabilities in isolated sandboxes, and proposes patches. Partners include Cisco, CrowdStrike, Palo Alto Networks, Cloudflare, and five others. Pricing undisclosed — sales contact only.