OpenAI is rolling out a new tiered Trusted Access for Cyber (TAC) program, letting verified security professionals use GPT-5.4-Cyber—a version fine-tuned for defensive tasks and binary reverse engineering. Access requires identity checks and may include restrictions like zero-data retention for high-sensitivity use cases.

• OpenAI is gating its most capable cyber model (GPT-5.4-Cyber) behind identity verification/KYC, only for vetted defenders
• Codex Security has already fixed 3,000+ high/critical vulnerabilities and helped 1,000+ open-source projects during a 6-month beta
• OpenAI classified GPT-5.4 as "high" cyber capability under its own Preparedness Framework, signaling real offensive potential that requires these access controls
• They've committed $10M to a Cybersecurity Grant Program alongside the Linux Foundation to shore up open-source security broadly