We continue to evolve trusted access, safeguards, and ecosystem support to help cyber defenders protect us all.
We are scaling up our Trusted Access for Cyber (TAC) program to thousands of verified individual defenders and hundreds of teams responsible for defending critical software. For years, we’ve been building a cyber defense program on the principles of democratized access, iterative deployment, and ecosystem resilience. In preparation for increasingly more capable models from OpenAI over the next few months, we are fine-tuning our models specifically to enable defensive cybersecurity use cases, starting today with a variant of GPT‑5.4 trained to be cyber-permissive: GPT‑5.4‑Cyber. In this post, we share how we expect our approach of scaling cyber defense in lockstep with increasing model capabilities to guide the testing and deployment of future releases.
The progressive use of AI accelerates defenders – those responsible for keeping systems, data, and users safe – enabling them to find and fix problems faster in the digital infrastructure everyone relies on. Similarly, AI is being used by attackers looking to cause harm. We’ve been preparing for this. Since 2023, we’ve supported defenders through our Cybersecurity Grant Program and strengthened safeguards through our Preparedness Framework . The same year, we started evaluating our models' cyber capabilities, and in 2025, we began including cyber-specific safeguards (opens in a new window) in our model deployments . Earlier this year, we furthered our support for defenders with the launch of Codex Security to identify and fix vulnerabilities at scale.
Source link
