OpenAI on Thursday announced that GPT-5.5-Cyber, a variation of its latest artificial intelligence model, is rolling out in a limited preview capacity to vetted cybersecurity teams, a month after rival Anthropic captivated investors and government officials with Claude Mythos Preview . The preview of GPT-5.5-Cyber is not intended to be a major step up in terms of cyber capability, but is instead trained to be more permissive on security-related tasks, OpenAI said in a blog post. OpenAI