Anthropic disables access to Fable 5 and Mythos 5 to comply with government directive

Anthropic on Friday announced it’s disabled access to its Fable 5 and Mythos 5 artificial intelligence models to comply with an export control directive from the U.S. government that cited “national security authorities.”

The company said it received an order at 5:21 p.m. ET, instructing it to suspend all access to the models “by any foreign national, whether inside or outside the United States, including foreign national Anthropic employees.”

Anthropic abruptly disabled the models for all of its customers in order to ensure compliance, but said all of its other models will not be affected.

The unexpected move comes just days after Anthropic announced Fable 5 and Mythos 5, two powerful models that the company touted as state-of-the-art across a number of different industry benchmarks. Fable 5 in particular marked the first time that Anthropic released such an advanced offering to the public, thanks to new safeguards that block responses in specific high-risk areas.

The models built on the release of Claude Mythos Preview, which captivated Wall Street and government officials with its advanced cybersecurity capabilities in April. The company said it did not plan to make the model generally available, and it has limited the rollout to a select group of companies as part of a cybersecurity initiative called Project Glasswing.