Anthropic says Mythos 5 gets approval for small set of select customers

Anthropic said its Claude Mythos 5 model will be available to "a set of US organizations that operate and defend critical infrastructure."

The move, a small one considering how many customers started using Mythos 5 and Fable 5 before being cut off. The Mythos 5 restoration to a small set of customers indicates some progress in dealings with the US government, but not much more. Here's the timeline:

• Anthropic’s Fable 5 and Mythos 5 dispute: Still a mess
• Anthropic shuts down Fable 5, Mythos 5 as US govt shuts down foreign national access
• Anthropic’s Dario Amodei wants governments to have the power to block ‘dangerous’ AI systems
• Anthropic’s Claude Fable 5, Mythos 5: What you need to know

Anthropic's thread on X about the limited restoration comes as OpenAI launched GPT-5.6 in limited preview.

There's no word on Fable 5. Here's Anthropic's full statement on X.

Since June 12, we’ve been working closely with the US government to restore access to Claude Mythos 5 and Fable 5. Today, the government notified us that Mythos 5, our strongest cybersecurity model, can be redeployed to a set of US organizations that operate and defend critical infrastructure.

We’re restoring access for these organizations quickly, and we’re continuing to work with the government to expand access to Mythos 5 and make Fable 5 available for general use again.

• Fable 5 and the Shift From Model Capability to Capability Governance
• My internal monologue reading Anthropic's big idea posts
• Claude Mythos and the New Cybersecurity Operating Model