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2 posts

• Daybreak: Inside OpenAI's AI-Powered Vulnerability Detection Initiative

  OpenAI's Daybreak initiative bundles GPT-5.5-Cyber, Codex Security, and Patch the Planet into a coordinated defender program. Here's what it can actually do today, how it compares to competing tools, and why the dual-use question is the part the announcements glossed over.

  Jun 27, 2026 vulnerability-detection openai defense-patterns tool-evaluation dual-use open-source-security ai-security-tooling

• Running Codex Safely at OpenAI — Sandboxing Patterns

  OpenAI's Codex runs every model-generated command inside an OS-enforced sandbox before it touches your filesystem or network. This post breaks down the layered isolation model — platform mechanics, approval flows, auto-review, and cloud isolation — and what each layer actually prevents.

  Jun 20, 2026 agent-security sandboxing defense-patterns openai tool-use