Our approach to enhancing baseline safeguards for all users while piloting trusted access for defensive acceleration.

GPT‑5.3‑Codex is our most cyber-capable frontier reasoning model to date. Cybersecurity is one of the clearest places where that progress can both meaningfully strengthen the broader ecosystem and introduce new risks. We’ve moved from models that can auto-complete a few lines in a code editor, to models that can work autonomously for hours or even days to accomplish complex tasks. These capabilities can dramatically strengthen cyber defense by accelerating vulnerability discovery and remediation.

To unlock the full defensive potential of these capabilities while reducing the risk of misuse, we are piloting Trusted Access for Cyber: an identity and trust-based framework designed to help ensure enhanced cyber capabilities are being placed in the right hands. This reflects our broader approach⁠ to responsibly deploying highly capable models. In addition, we are committing $10 million in API credits to accelerate cyber defense.

It is very important the world adopts frontier cyber capabilities quickly to make software more secure and continue to raise the bar of security best practices. Highly capable models can help organizations of all sizes strengthen their security posture, reduce response times, and improve resilience, while enabling security professionals to better detect, analyze, and defend against the most severe and targeted attacks. These advances have the potential to meaningfully raise the baseline of cyber defense across the ecosystem if they are put to work in the hands of people focused on protection and prevention.

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