GPT-5.5-Cyber built a zlib fuzzing lab in a day

We’re running Patch the Planet, an ongoing collaboration with OpenAI that pairs Trail of Bits engineers directly with more than 30 open-source projects. Its goal is to front-run a serious problem facing open-source maintainers: highly capable models like GPT-5.5-Cyber will soon create a firehose of bug reports, and OSS maintainers are already spread thin. Our plan is to point OpenAI’s latest models at real codebases, find the security bugs first, work with maintainers to patch them, and find way