DarkReading.com reported that “The security community criticized the US government’s decision to restrict Anthropic Claude Mythos and Fable use to foreign nationals, and many have asked the government to reverse course.” The June 16, 2026 article entitled “Security Community Slams US Ban on Exporting Mythos, Fable” (https://www.darkreading.com/vulnerabilities-threats/security-community-slams-us-ban-on-exporting-mythos-fable) included these comments:
Following last week’s launch of Anthropic’s highly anticipated Fable 5 and Mythos 5 models, the company suspended use of the models for all customers on June 12. This was a direct response to the US government issuing an export control order preventing access to all foreign nationals from using the large language models (LLMs), including those that work for Anthropic themselves. The suspension of the models was to ensure compliance with the order.
In a statement, Anthropic said the government had national security concerns with the frontier models; Mythos in particular is said to be capable of discovering critical vulnerabilities and developing novel critical exploits in software. Security experts have warned that Mythos, and models like it, will change the vulnerability remediation landscape, and organizations must become “Mythos-ready” for the threat actors that will attempt to abuse the LLM.
Anthropic previously said Mythos would remain exclusive to a select group of partners, and consumer-grade Fable has stringent guardrails the AI vendor believes will prevent abuse at scale. For example, when consumers make requests to Fable for assistance with certain topics like cybersecurity and biology, Fable will pull in Claude Opus 4.8, the previous model, to output a response instead.
The government has not stated a specific reason for the export control, though Anthropic believes it’s due to a supposed jailbreaking technique.
“We have not even received a disclosure of a concerning non-universal potential jailbreak that led to a harmful result,” Anthropic said in its statement. “The potential jailbreaks that have been disclosed to us are either entirely benign responses or are minor findings that provide no Mythos-specific uplift.”
What do you think?
First published at https://www.vogelitlaw.com/blog/cybersecurity-community-unhappy-about-us-ban-on-exporting-anthropic-llms