Anthropic has confirmed that the US government issued an export control directive ordering the company to suspend all access to two of its frontier models, Fable 5 and Mythos 5, for every user worldwide — including foreign nationals and Anthropic’s own foreign employees. The announcement was made on June 12, 2026, in an official statement on Anthropic’s website.
What happened
According to Anthropic, the directive cites national security concerns. The government says it identified a method to bypass the safety safeguards built into Fable 5, which — like Mythos 5 — was designed with extra protections aimed at preventing misuse in cybersecurity contexts.
Anthropic reviewed the technique the government flagged and described it as involving “asking the model to read a specific codebase and fix any software flaws” — a capability the company says is widely available in competing AI models, not unique to Fable 5.
Anthropic’s response
While complying with the legal directive, Anthropic pushed back on the underlying reasoning. In its statement, the company said: “we disagree that the finding of a narrow potential jailbreak should be cause for recalling a commercial model deployed to hundreds of millions of people.”
Anthropic also warned that applying this standard across the industry “would essentially halt all new model deployments” — suggesting the precedent could affect how all AI labs handle vulnerability disclosures going forward.
What’s affected — and what isn’t
- Suspended: Fable 5 and Mythos 5, for all users globally, regardless of location or nationality.
- Unaffected: All other Anthropic/Claude models remain available as normal, according to the company’s statement.
What this means for you
- If you were using Fable 5 or Mythos 5 (for example, via the API or a specific model selector), expect those options to be unavailable or grayed out until further notice. Switch to another available Claude model for your workflow in the meantime.
- If you don’t recognize these model names, you’re almost certainly unaffected — Fable 5 and Mythos 5 were newer, specialized frontier-tier releases, not the default Claude models most people use day to day.
- Developers building on the API should check their model configuration and add a fallback model in case a request to Fable 5 or Mythos 5 fails.
- Keep an eye on official channels — this is a fast-moving legal/regulatory situation, and the suspension’s duration hasn’t been specified.
FAQ
Is Claude itself shut down?
No. Anthropic says only Fable 5 and Mythos 5 are suspended; its other Claude models continue to operate normally.
Why did the government get involved?
The directive was issued as an export control measure, citing national security concerns related to a reported method for bypassing Fable 5’s safeguards.
Bottom line: This is a targeted suspension of two specific frontier models following a government directive, not a broader Claude outage. We’ll update this article as Anthropic shares more information.
Official source and further reading
For the latest status on this directive, check Anthropic’s own channels directly:
- Anthropic — official statement on the Fable 5 / Mythos 5 suspension
- Anthropic news — for any follow-up updates
Related AI Fix Hub coverage
- Can’t Access Fable 5 or Mythos 5? Here’s What’s Going On — what to do if your workflow used either model
- Why Every Major AI Company Is Suddenly Talking About ‘Context Windows’
- How to Build Your First App With Claude Code or Cursor (No Experience Needed)
Editorial note: This is a developing story. We’ll update this article if Anthropic or the US government share additional information about the scope or duration of the suspension.
Corrections: Found something outdated or incorrect? Contact AI Fix Hub so we can review and update this article.
Source: Anthropic — official statement.