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Our response to the US ban on Fable 5 and Mythos 5

isaacus.com

June 13, 2026

3 min read

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50/100

Summary

The US government has issued an export control directive banning access to Anthropic's LLMs, Fable 5 and Mythos 5, for foreign nationals, including Anthropic employees. As a result, Anthropic has taken both models offline globally.

Key Takeaways

The US government issued an export control directive banning access to Anthropic's Fable 5 and Mythos 5 for foreign nationals, including Anthropic's own employees.
This is the first instance of the US implementing export controls on access to large language models (LLMs), affecting nationals from allied countries regardless of their residency in the US.
Isaacus has committed to making all its AI models available for air-gapped self-hosting to ensure accessibility and reduce dependency on external LLMs.
The company emphasizes the importance of AI sovereignty for mission-critical work, highlighting the risks associated with reliance on external AI systems.

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Community Sentiment

Mixed

Positives

The commitment to making every released model available for air-gapped self-hosting emphasizes the importance of AI sovereignty and accessibility, which is commendable.
The ongoing development of open-source LLMs ensures that AI capabilities will persist beyond the influence of major corporations, fostering innovation and diversity in the field.

Concerns

Concerns about the reliability of LLMs in critical applications, such as legal work, highlight significant trust issues that could hinder broader adoption.
The government's extreme measures to control AI development reflect deeper issues of accessibility and the potential for misuse, raising ethical concerns about AI governance.