---
title: "Statement on the US government directive to suspend access to Fable 5 and Mythos 5"
description: "Anthropic says the US government issued an export-control directive requiring it to suspend Fable 5 and Mythos 5 access for every foreign national, including foreign-national Anthropic employees, inside or outside the United States. The directive arrived at 5:21 p.m. ET and did not specify the national-security concern; Anthropic says it understands the basis to be a potential narrow, non-universal jailbreak involving a request to inspect a codebase and fix software flaws. The company says it reviewed the underlying report, found only previously known minor vulnerabilities, and judged the demonstrated capability widely available from other models, including OpenAI’s GPT-5.5. Anthropic is complying by disabling both models for all customers and says it is working to restore access."
---

# Statement on the US government directive to suspend access to Fable 5 and Mythos 5

[Anthropic](https://yomu.fyi/company/anthropic) · Jun 13, 2026

**Type:** Announcement

## Summary

Anthropic says the US government issued an export-control directive requiring it to suspend Fable 5 and Mythos 5 access for every foreign national, including foreign-national Anthropic employees, inside or outside the United States. The directive arrived at 5:21 p.m. ET and did not specify the national-security concern; Anthropic says it understands the basis to be a potential narrow, non-universal jailbreak involving a request to inspect a codebase and fix software flaws. The company says it reviewed the underlying report, found only previously known minor vulnerabilities, and judged the demonstrated capability widely available from other models, including OpenAI’s GPT-5.5. Anthropic is complying by disabling both models for all customers and says it is working to restore access.

## Context

The US government issued an export-control directive requiring suspension of Fable 5 and Mythos 5 access for foreign nationals, citing national-security authorities but providing no specific details. Anthropic says the directive appears to relate to a potential narrow, non-universal jailbreak and disputes that this should require recalling a commercial model.

## Approach / What changed

Anthropic is complying by disabling Fable 5 and Mythos 5 for all customers. It says its defense-in-depth strategy combines safeguards, monitoring, and 30-day customer-data retention, and it is working to restore access while seeking more details and sharing its assessment of the reported technique.

## Takeaways

- The directive affects Fable 5 and Mythos 5 access for foreign nationals inside or outside the United States, while access to Anthropic’s other models is not affected.
- Anthropic says the reported technique is narrow and non-universal, involves asking the model to inspect a codebase and fix software flaws, and produces capability available from other models.
- Anthropic says it reviewed the report, found previously known minor vulnerabilities, and is complying with the directive despite disagreeing that the finding warrants recalling the models.

**Tags:** [AI](https://yomu.fyi/topic/ai), [AI Security](https://yomu.fyi/topic/ai-security), [Compliance](https://yomu.fyi/topic/compliance)

- Source: [Anthropic](https://www.anthropic.com/news/fable-mythos-access)
- Source URL: https://www.anthropic.com/news/fable-mythos-access
- Ingested by Yomu: 2026-09-09T11:38:23.934Z

[Read original post](https://www.anthropic.com/news/fable-mythos-access)