Jul 29, 2026
OpenAI announced Thursday it is rolling out GPT-5.5-Cyber (codenamed 'Spud') to vetted cybersecurity professionals for finding vulnerabilities and analyzing malware. Security testing shows the model can autonomously execute sophisticated cyberattacks, completing a 32-step corporate network simulation and solving a 12-hour security puzzle in 10 minutes, matching capabilities of Anthropic's Mythos released a month earlier.