OpenAI in talks with EU over access to new cyber model but Anthropic still holding out on Mythos

OpenAI is in discussions with the European Union over access to its new cyber model, but Anthropic is still holding out on releasing Mythos to the bloc, the European Commission has said. OpenAI announced Thursday that GPT-5.5-Cyber, a variation of its latest AI model, was rolling out in limited preview capacity to vetted cybersecurity teams. It came a month on from Anthropic releasing its own model, Mythos, that prompted a wave of fears around cyberattacks on critical software. …