Anthropic announced that they will begin restoring access to the Mythos 5 and Fable 5 programs today.Image: www.imago-images.de
Jul 1, 2026, 3:19 amJul 1, 2026, 3:19 am
The US government has lifted its export bans on the latest AI models from OpenAI rival Anthropic after more than two weeks. Anthropic announced that they will begin restoring access to the Mythos 5 and Fable 5 programs today.
The government had decreed that only Americans could have access to the AI models – which also applied to company employees. Anthropic then blocked both models completely in order to be able to meet the demand.
The artificial intelligence behind Anthropic’s AI model Mythos is particularly good at detecting software vulnerabilities that have remained undetected for decades. This capability has so far been used by US authorities and selected companies to plug security gaps. One concern from the start was that such AI could become a dangerous cyber weapon in the wrong hands.
The Fable 5 model, released in mid-June, is based on Mythos technology – but its cybersecurity and biotechnology capabilities are blocked. Myth 5, meanwhile, is the non-public full version, which should only be available to authorities and selected companies so that they can close security gaps in their systems.
The lockdown had also sparked concerns in Europe. Following the crackdown on Anthropic, ChatGPT developer OpenAI granted access to its latest AI model only to partners aligned with the US government.
Weeks of conversations
The government’s actions were triggered by warnings that security measures designed to prevent the use of Fable 5 to search for software vulnerabilities could be undermined. Anthropic denied there was any danger. The government and companies have held tough discussions in recent weeks.
In a letter published by US media regarding the lifting of the ban, Trade Secretary Howard Lutnick pointed out that, among other things, the company had agreed to proactively look for security risks in the models and plug them.
Tensions with US government
Anthropic has repeatedly made headlines in recent months. The company risked conflict with the US government by insisting, despite pressure, that its AI models could not be used in autonomous weapons systems and for mass surveillance in the US.
The Pentagon then declared Anthropic a supply chain risk, which could severely impact the use of the company’s software in government agencies. The company is suing. Mythos’ exceptional cybersecurity capabilities made Anthropic important to the US government again. (sda/dpa)