Anthropic gets US approval to bring back Claude Mythos 5
Quick Answer
Anthropic has received US approval to redeploy Claude Mythos 5 for organizations managing critical infrastructure.
Quick Take
Negotiations for broader access and the return of Fable 5 are ongoing, but no timeline has been established.
Key Points
- Claude Mythos 5 is now approved for critical infrastructure use in the US.
- Anthropic is negotiating for broader access to its models.
- No timeline has been set for the return of Fable 5.
📖 Reader Mode
~1 min read
Jun 27, 2026
The US government has approved Anthropic to redeploy Claude Mythos 5, according to the company. The model is Anthropic's most powerful AI model for cybersecurity and can now be used again by US organizations that operate and protect critical infrastructure. The approval likely mirrors the one granted to OpenAI, which can offer its new frontier model GPT-5.6 Sol to select organizations and customers. Under this exception, Anthropic employees who aren't US nationals and members of approved organizations who aren't US nationals are all cleared to use Mythos 5.
Anthropic is also working with the government to expand access to Mythos 5 and make Fable 5 broadly available again. The company hasn't given a timeline. OpenAI expects "a few weeks" for GPT-5.6 Sol.
Since June 12, Anthropic had been working with the US government to restore access to Mythos 5 and Fable 5. Both models had been blocked earlier on government orders.
— Originally published at the-decoder.com
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