After dissing Anthropic for limiting Mythos, OpenAI restricts access to Cyber, too
OpenAI is restricting access to GPT-5.5 Cyber, its cybersecurity testing tool, to a limited group of critical cyber defenders, mirroring Anthropic's approach to limiting access to its Mythos model. This move reflects growing industry caution around deploying advanced AI capabilities that could pose security risks if widely distributed.
