/Tech10h ago

Anthropic disables Fable 5 and Mythos 5 models globally after US Commerce Department imposes strict export controls

Story Overview

The fresh Fable 5 and Mythos 5 releases from Anthropic were taken offline worldwide within days of launch once the Commerce Department applied national-security export rules that bar any foreign-national access, leaving the company no practical way to keep the models running for anyone.

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Original post

Judith Dada@DadaJudith

Holy shit. We seriously need to wake up now. http://Europe2031.ai

Anthropic@AnthropicAI

The US government, citing national security authorities, has issued an export control directive to suspend all access to Fable 5 and Mythos 5 by any foreign national, whether inside or outside the United States, including foreign national Anthropic employees.

The net effect of this order is that we must abruptly disable Fable 5 and Mythos 5 for all our customers to ensure compliance.

Access to all other Claude models is not affected.

We apologize for this disruption to our customers. We believe this is a misunderstanding and are working to restore access as soon as possible.

Read our full statement: https://www.anthropic.com/news/fable-mythos-access

6:35 PM · Jun 12, 2026 · 19.5K Views

Policy Risk

Why selective access proved impossible

Anthropic says the order’s breadth forced a complete global shutdown rather than a targeted block, even though the company views the underlying technological concern as a misunderstanding.

Open Question

What stays available while the new variants sit idle

All other Claude models continue without interruption, so users lose only the two newest configurations whose safeguard differences apparently drew the government’s attention.

Sentiment

Many users criticized the Trump administration's export controls on Anthropic Mythos 5 and Fable 5 models as stupid political interference.

Pos

20.2%

Neg

79.8%

117 comments with sentiment.

Cluster Engagement

Posts from X

Most Activity

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Andrew Curran@AndrewCurran_

From the statement: 'The US government, citing national security authorities, has issued an export control directive to suspend all access to Fable 5 and Mythos 5 by any foreign national, whether inside or outside the United States, 𝘪𝘯𝘤𝘭𝘶𝘥𝘪𝘯𝘨 𝘧𝘰𝘳𝘦𝘪𝘨𝘯 𝘯𝘢𝘵𝘪𝘰𝘯𝘢𝘭 𝘈𝘯𝘵𝘩𝘳𝘰𝘱𝘪𝘤 𝘦𝘮𝘱𝘭𝘰𝘺𝘦𝘦𝘴. The net effect of this order is that we must abruptly disable Fable 5 and Mythos 5 for all our customers to ensure compliance.'

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Andrew Curran@AndrewCurran_

This was all allegedly triggered by a Mythos jailbreak that was shared with the US Government. This is Anthropic's response:

'To date, the government has only given us verbal evidence of a potential narrow, non-universal jailbreak, which essentially consists of asking the model to read a specific codebase and fix any software flaws. Our understanding is that one potential jailbreak was shared with the government. We have reviewed a report that we believe is the basis of the government's directive and validated that the level of capability displayed there is widely available from other models (including OpenAI’s GPT-5.5), and is used every day by the defenders who keep systems safe. We will share more details over the next 24 hours.'

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Andrew Curran@AndrewCurran_

This allegedly was triggered by a successful jailbreak of Mythos by an unnamed group who reported it to the government. We will hopefully get details soon.

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Andrew Curran@AndrewCurran_

Conversations between Amazon CEO Andy Jassy and Treasury Secretary Scott Bessent led to the decision by the White House last night to control the use of Fable 5 and Mythos 5, which resulted in Anthropic's subsequent decision to remove them from public use.

Andrew Curran@AndrewCurran_

The Trump administration has placed Anthropic's Mythos 5 and Fable 5 under export controls. Commerce Secretary Howard Lutnick sent a letter to Dario Amodei tonight stating that foreign governments, companies, and individuals will no longer have access to either model.

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Andrew Curran@AndrewCurran_

Apparently the administration asked Anthropic to not release Mythos 5 or Fable 5 at all, and this is a reaction to them doing it anyway.

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Andrew Curran@AndrewCurran_

The jailbreak that triggered all of this was reported by Amazon.

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Andrew Curran@AndrewCurran_

Statement from Anthropic. This literally happened 40 minutes ago.

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Andrew Curran@AndrewCurran_

It's starting already!

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Andrew Curran@AndrewCurran_

This apparently applies to everyone who is not an American citizen, inside or outside of the country. Foreign nationals and corporations are both banned from use.

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Andrew Curran@AndrewCurran_

Confirmed!

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Andrew Curran@AndrewCurran_

Apparently Mythos 5 specifically is being placed under special restriction by the Pentagon and will not be allowed for use even by most Government employees. Restricted to agencies only.

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Andrew Curran@AndrewCurran_

Anthropic is disabling Fable 5 for everyone. All users. It's going to be a fight.

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Andrew Curran@AndrewCurran_

Full statement: https://www.anthropic.com/news/fable-mythos-access

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Andrew Curran@AndrewCurran_

From Axios.

Andrew Curran@AndrewCurran_

With this context, the extreme guardrails on Fable 5 that everyone was complaining about make more sense. It looks like Anthropic implemented them in response to government pressure not to release Fable 5 or Mythos 5 at all. They were hoping it would be enough, but it wasn't.

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Andrew Curran@AndrewCurran_

https://www.wsj.com/tech/ai/anthropic-halts-access-to-top-ai-models-after-u-s-ban-on-foreign-use-a4bca2cc

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