These kinds of tasks would normally get refusals for security reasons, but with Cyber access, developers can go as far as reverse engineering entire apps to poke for bugs.
The model is based on ChatGPT-5.4, but OpenAI says they are expanding the entire Cyber program now «in preparation for increasingly capable models over the next few months […] whose capabilities will rapidly exceed even the best purpose-built models of today.»
The release comes hot on the heels of Anthropic’s Mythos model and «Project Glasswing,» said to be so advanced they won’t release the full model.
To get access to GPT-5.4-Cyber, you have to first verify that you are a cybersecurity professional with OpenAI, and even then you might get «limited» access based on a tier system.
Read more: OpenAI’s announcement, Reuters and Axios.