OpenAI announced Thursday it is rolling out a more permissible version of GPT-5.5, dubbed "Spud," to vetted cyber defenders. The move opens a limited preview of GPT-5.5-Cyber to those responsible for securing critical infrastructure.
The decision comes amid recent security testing showing the model is nearly as adept at finding and exploiting software bugs as Anthropic's Mythos Preview. This capability has ignited urgent debate in Silicon Valley and the White House about preventing misuse by malicious actors.