A cyber model shifts the mission from finding flaws to patching them

Claim

OpenAI expanded Daybreak with a Codex Security plugin and the full GPT-5.5-Cyber, which hit a state-of-the-art 85.6% on CyberGym, edging out Mythos 5, and shifted the mission from finding vulnerabilities to autonomously patching them through a Patch the Planet effort with Trail of Bits.

Reported metric: 85.6%

Reporting date: 2026-06-24 (not necessarily the event date)

Sources

Attribution and reporting linked by this record; links do not imply independent verification.

• Welcome to June 24, 2026 (theinnermostloop.substack.com)