OpenAI’s GPT-5.5-Cyber finds a 23-year-old OpenBSD bug. The core facts are straightforward: OpenAI expanded Daybreak with GPT-5.5-Cyber, a security-specialized model scoring 85.6% on CyberGym versus 81.8% for the base model.
The second layer is where the story becomes more important: Reported findings include an old OpenBSD use-after-free issue, exploitable V8 bugs, WebKit flaws and a Firefox WebAssembly fix before Pwn2Own Berlin.
What matters next is execution. Patch the Planet adds human review from Trail of Bits and coordination with HackerOne so open-source maintainers are not flooded with raw model output.
Sources: CocoLoop and public reports cited in the original article