Amazon's cybersecurity research led to a White House directive banning foreign nationals from using Anthropic's Fable 5 and Mythos 5 models, sparking debate over whether the findings constitute a jailbreak.
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<p class="has-text-align-none">According to the<em> <a href="https://www.wsj.com/tech/ai/amazon-ceos-talks-with-u-s-officials-triggered-crackdown-on-anthropic-models-dcc90578?mod=hp_lead_pos1">Wall Street Journal</a></em>, the export control directive that led to Anthropic <a href="https://www.theverge.com/ai-artificial-intelligence/949553/anthropic-fable-5-mythos-5-government-national-security">cutting off access</a> to Fable 5 and Mythos 5 was triggered in part by cybersecurity research from Amazon and conversations between CEO Andy Jassy and the White House. According to the report, the paper from Amazon claims that, through a series of prompts, it was able to get <a href="https://www.theverge.com/news/946725/anthropic-releases-claude-fable-5-mythos">Fable 5</a> to serve up information that could be used in cyberattacks. Amazon has yet to respond to a request for comment.</p>
<p class="has-text-align-none">Shortly after Jassy shared the company's findings with the government, it made the call to block its use by foreign nationals. Complicating this issue is that many of …</p>
<p><a href="https://www.theverge.com/ai-artificial-intelligence/949601/amazon-anthropic-fablemythos-government-ban">Read the full story at The Verge.</a></p>
# Amazon security research reportedly led to the White House’s Anthropic Fable ban
Source: [https://www.theverge.com/ai-artificial-intelligence/949601/amazon-anthropic-fablemythos-government-ban](https://www.theverge.com/ai-artificial-intelligence/949601/amazon-anthropic-fablemythos-government-ban)
[](https://www.theverge.com/authors/terrence-obrien)
Terrence O'Brien
is the Verge’s weekend editor\. He has over 18 years of experience, including 10 years as managing editor at Engadget\.
According to the*[Wall Street Journal](https://www.wsj.com/tech/ai/amazon-ceos-talks-with-u-s-officials-triggered-crackdown-on-anthropic-models-dcc90578?mod=hp_lead_pos1)*, the export control directive that led to Anthropic[cutting off access](https://www.theverge.com/ai-artificial-intelligence/949553/anthropic-fable-5-mythos-5-government-national-security)to Fable 5 and Mythos 5 was triggered in part by cybersecurity research from Amazon and conversations between CEO Andy Jassy and the White House\. According to the report, the paper from Amazon claims that, through a series of prompts, it was able to get[Fable 5](https://www.theverge.com/news/946725/anthropic-releases-claude-fable-5-mythos)to serve up information that could be used in cyberattacks\. Amazon has yet to respond to a request for comment\.
Shortly after Jassy shared the company’s findings with the government, it made the call to block its use by foreign nationals\. Complicating this issue is that many of Anthropic’s researchers are foreign\-born, meaning they were barred from accessing their own product\.
In a[statement](https://www.anthropic.com/news/fable-mythos-access), Anthropic disputed the government’s characterization of the issue as a “jailbreak\.” It argued that many of the same vulnerabilities could be discovered using other publicly available models, including GPT 5\.5\. Some security researchers appear to back the company’s interpretation\. Katie Moussouris, the founder and CEO of LutaSecurity[posted on BlueSky](https://bsky.app/profile/k8em0.bsky.social/post/3mo6ik3hruk2e)that “I’ve seen the paper\. It’s not a jailbreak\.” Former Commerce Department official[Kate Koren](https://www.csis.org/people/kate-koren)speculated to the*WSJ*that the White House’s dislike of Anthropic may have influenced the decision\.
Anthropic and the Trump administration have been[at odds](https://www.theverge.com/news/885773/anthropic-department-of-defense-dod-pentagon-refusal-terms-hegseth-dario-amodei)for[some time](https://www.theverge.com/ai-artificial-intelligence/883456/anthropic-pentagon-department-of-defense-negotiations)over the company’s refusal to allow its AI to be used for mass surveillance of Americans or to power lethal autonomous weapons\. In February, Trump instructed federal agencies to[stop using](https://www.theverge.com/policy/886489/pentagon-anthropic-trump-dod)Anthropic’s AI\. And just hours later, Secretary of Defense Pete Hegseth designated the company a[supply chain risk](https://www.theverge.com/policy/886632/pentagon-designates-anthropic-supply-chain-risk-ai-standoff)\.
The government and the company seemed to have[made](https://www.theverge.com/ai-artificial-intelligence/913516/now-the-white-house-is-reportedly-preparing-for-access-to-mythos)[amends](https://www.theverge.com/ai-artificial-intelligence/914229/tides-turning-anthropic-trump-administration-cybersecurity-mythos-preview), and the two had worked together to[expand access](https://www.anthropic.com/news/expanding-project-glasswing)to Mythos\. However, now the two seem destined to clash again\.
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- Terrence O'Brien
Following Amazon CEO Andy Jassy's discussions with US officials, the Trump administration halted foreign use of Anthropic's Fable 5 model over cybersecurity vulnerabilities, leading Anthropic to withdraw access to its Mythos and Fable models, though the company argues the vulnerabilities are basic and common.
The US government forced Anthropic to pull its latest AI models, Fable 5 and Mythos 5, citing national security concerns after a reported jailbreak. The move has sparked debate and an open letter from cybersecurity researchers calling it dangerous.
Amazon alerted the White House to a security flaw in Anthropic's Claude Fable 5 model, causing its export suspension. The flaw allows the model to identify exploitable security vulnerabilities, contradicting Anthropic's safety claims.
The US government issued an export control directive forcing Anthropic to pull its Fable 5 and Mythos 5 AI models offline, citing national security concerns. Security researchers argue the alleged guardrail bypass does not justify such action and that the move harms US cyber defense.
Anthropic is in a dispute with the Trump administration over export controls on its Claude Fable 5 model, after the White House imposed restrictions due to jailbreaking concerns that Amazon CEO Andy Jassy raised with Treasury Secretary Scott Bessent. Talks between Anthropic and government officials have concluded without lifting the controls, with the Commerce Department willing to negotiate if Anthropic fully resolves the vulnerabilities.