OpenAI said Monday it would grant the European Union access to its new cyber model, but Anthropic is still holding out on releasing Mythos to the bloc.
European partners including businesses, governments, cyber authorities and EU institutions such as the EU AI office, would be granted access to OpenAI’s GPT-5.5-Cyber, a variation of its latest AI model, the company said.
OpenAI announced it was rolling out the model 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.
While the Commission had had “four or five” meetings with Anthropic, Regnier said that discussions with the company were “not yet at the same stage as the solution we have on the table from OpenAI.”
“AI labs like ours shouldn’t be the sole arbiters of cyber safety as resilience depends on trusted partners working together,” OpenAI’s Head of OpenAI for Countries George Osborne, said in a statement.
“The latest cyber AI capabilities should be available for Europe’s many defenders, not just the few, and we want to help make that happen,” he added.
“Through the OpenAI EU Cyber Action Plan, we will work with European policymakers, institutions and businesses by democratizing access to the defensive tools that trusted actors can use to strengthen shared security, support public safety and reflect European priorities.”
Anthropic has been approached for comment.
