US Government Authorizes Anthropic Claude Mythos 5 Release

The United States government has lifted its block on Anthropic’s powerful Claude Mythos 5 AI model, authorizing its release to more than 100 U.S. institutions, including major corporations and government agencies. The decision, communicated in a letter sent Friday afternoon, represents a significant de-escalation in the tension between the Trump Administration and Anthropic.

A Shift in Regulatory Oversight

The move follows a two-week period during which the administration imposed export controls on Mythos and its companion model, Fable 5. The restrictions were initially prompted by concerns from companies like Amazon that the models could be "jailbroken" for malicious use. Commerce Secretary Howard Lutnick wrote to Anthropic’s chief compute officer, Tom Brown, stating that he had determined "appropriate safeguards are in place" to allow trusted partners access to the technology.
This development signals the emergence of a new regulatory framework that grants the U.S. government oversight regarding the release of frontier AI models. While leaders in the AI industry have expressed concerns about potential delays in the global competitive race, Commerce Department spokesman Benno Kass emphasized the speed of the government’s response. "In just two weeks, we have worked diligently to ensure America remains the global leader in AI while safeguarding our security," Kass said.

Future Access and Industry Competition

While the Claude Mythos 5 model is now cleared for specific partners, the status of the Fable 5 model remains uncertain. The letter from the Commerce Department did not address the weaker, consumer-facing model, though individuals familiar with the discussions suggest that talks regarding its release are ongoing. Under the new arrangement, Anthropic is no longer required to obtain a license to export or transfer the Mythos 5 model to entities identified in the government's letter or to their foreign national employees.
The government's decision coincides with a limited release of GPT-5.6 by Anthropic’s competitor, OpenAI, which has also been provided to a select list of government-approved partners. As the U.S. builds its oversight framework, many international entities and consumers remain without access to these advanced tools. European officials and other U.S. allies have voiced frustration regarding their dependence on Washington’s regulatory decisions. The initial government concerns regarding Mythos were reportedly linked to the model’s availability to partners with close ties to China, specifically a South Korean telecommunications provider.