The Trump administration has lifted restrictions on Anthropic's latest Claude AI chatbot models, ending a ban that was put in place due to cybersecurity concerns. The move allows Anthropic's AI model, Claude Fable 5, to be widely available and restores access to its more powerful model, Mythos 5, for select U.S.-based organizations approved by the government.
The Commerce Department had blocked foreign nationals from using both models on June 12, prompting Anthropic to remove the products from public access shortly after their unveiling. The government's concerns were reportedly triggered by a report from Amazon, Anthropic's cloud computing provider, which identified a method to bypass Fable 5's safeguards. This bypass could allow for the discovery and potential exploitation of software vulnerabilities.
Earlier this year, Anthropic had warned that its Mythos model demonstrated an advanced capability for identifying software flaws, raising concerns about its potential weaponization by malicious actors to threaten critical computer networks globally.
In a related development, OpenAI, a chief rival to Anthropic, also stated it is restricting the release of its new AI model, GPT-5.6 Sol, at the request of the Trump administration. This new product will initially be accessible only to a limited group of government-approved customers.
These actions follow President Trump's executive order last month on AI oversight, which established a framework for the federal government to assess national security risks associated with advanced AI systems for up to 30 days before public release. While participation by AI developers under this framework is voluntary, the full development of the framework is still ongoing.