OpenAI launches GPT-5.5-Cyber and open-source patching effort (opens in new tab)

OpenAI announced a set of cybersecurity tools under its Daybreak initiative, including an improved GPT-5.5-Cyber model for verified defenders, an updated Codex Security plugin and a new Patch the Planet program for open-source software maintainers. The company said GPT-5.5-Cyber can analyze large codebases, validate vulnerabilities in controlled environments and help develop and test patches, while Codex Security can scan code, triage findings and generate remediation guidance for human revie...