According to KyeGomezB, OpenAI released GPT-5.5-Cyber with top CyberGym scores and security tools, as Sam Altman teased rapid post-Mythos model advances.

According to Sam Altman, GPT-5.5-Cyber achieves state-of-the-art on CyberGym and teams with Patch The Planet and Codex Security to fix vulnerabilities.

According to satyanadella, Microsoft’s agentic security system used 100+ models, found 16 bugs pre–Patch Tuesday, and leads CyberGym, per Microsoft.