OpenAI Launches Full-Scale Effort to Patch Open-Source Bugs as It Takes on Anthropic’s Mythos

OpenAI has announced an improved version of its GPT-5.5-Cyber model alongside a new initiative called 'Patch the Planet' aimed at helping open-source maintainers secure their projects.

OpenAI described the initiative as a 'full-scale effort' to address vulnerabilities across the open-source ecosystem. The improved GPT-5.5-Cyber model is designed to assist in identifying and patching bugs, though specific technical improvements over prior versions were not detailed in the announcement.

The move comes amid increasing scrutiny of AI supply chain security and growing competition between major AI labs. Anthropic's Mythos model has been noted for its emphasis on safety features. The inclusion of a state government partnership suggests potential regulatory considerations in the initiative's development. Further details on the scope, funding, or timeline of the 'Patch the Planet' initiative were not provided.