Anthropic's Mythos 5 has resumed operations for select organizations after lengthy negotiations with the Trump administration, while public-facing Fable 5 remains on hold.

Anthropic disabled access to its Fable 5 and Mythos 5 models to comply with a government export control directive citing "national security authorities."

After weeks of negotiations, the White House permitted Anthropic to restore access to its most advanced AI model for a select group of US companies and government agencies.

The US government has authorised a limited release of Anthropic's advanced artificial intelligence model, Mythos 5, allowing a small group of trusted American cybersecurity firms…