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.
“We welcome OpenAI’s transparency and intent to give commission access to new model,” Commission Spokesperson Thomas Regnier said at a press briefing on Monday.
He confirmed an exchange had taken place between OpenAI and the EU, and that there were further discussions planned this week around access to the model.
“This will allow us to follow deployment of the model very closely, and address security concerns,” he added.
Though Mythos was released a month ago, Anthropic has yet to grant the EU preview access to review it.
The EU is discussing access with Anthropic, Regnier said, but added that the discussions are at a “different stage” than they were with OpenAI.
OpenAI and Anthropic have been approached for comment.
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