OpenAI has launched Patch the Planet, a new initiative aimed at fixing the chronically underfunded security of open-source software. The initiative pairs OpenAI’s most security-capable AI models with Trail of Bits, a security firm that has committed its entire research organization to the effort, alongside support from HackerOne and Calif. Researchers use OpenAI’s Codex Security and GPT-5.5-Cyber models to investigate and validate issues, then personally review every finding before it ever reaches a maintainer. OpenAI is also subsidizing roughly 20 trillion tokens worth of Codex Security usage for open-source and private code alike. More than 30 projects are already participating, including cURL, Python, and the Go project, with Trail of Bits running an opening sprint using a fifth of its entire workforce. The effort has already surfaced hundreds of bugs and dozens of patches in its first week alone. This announcement also lands as rival Anthropic was forced to pull its Mythos 5 and Fable 5 models from the market this month over White House concerns about AI cybersecurity capabilities. OpenAI’s updated GPT-5.5-Cyber reportedly outscores Mythos 5 on the CyberGym benchmark, 85.6% to 83.8%.