By Pieter Haeck
Publication Date: 2026-06-13 10:11:00
The company claimed that the U.S. government imposed export controls because it feared that some of the models’ built-in security measures could be circumvented, a process known as “jailbreaking.”
“So far, the government has only given us verbal evidence of a potentially limited, non-universal jailbreak,” the company said. It added that it does not believe “that the finding of low potential jailbreak should be grounds for recall of a commercial model.”
In early April, Anthropic announced that it had granted access to Mythos Preview to a limited number of trusted technology and cyber companies through the Glasswing project to help them strengthen cyber defenses.
The decision left many non-US governments and entities, such as the EU institutions, fighting for access.
Fable 5, which launched just this week, is described as a “Myth-class model” that the company has added safeguards to make it safe for general use.
“Without safeguards, Fable 5’s capabilities in areas such as cybersecurity could be compromised…”
