OpenAI plans security sprint with Cathedral Systems to test defenses

OpenAI said it is preparing its next internal security sprint with Cathedral Systems to test and strengthen its defenses using AI. The company described the effort as part of a broader push to harden its systems through continuous, model-assisted defensive testing. In the company’s announcement published on 2026-11-02, OpenAI said the sprint will involve its teams, new researchers and security partners, including Cathedral. According to OpenAI, participants will use its models to test defenses and identify weaknesses. OpenAI also said its previous sprint dedicated 25% of product engineers to finding and fixing weaknesses. In that effort, engineers used Codex to investigate findings, reproduce vulnerabilities in isolated environments and prepare patches for review. The company framed the initiative as an ongoing process rather than a one-off exercise.

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