- Access to Mythos 5 and Fable 5 has been pulled by Anthropic
- The move is following a directive from the US government
- A potential jailbreak is likely the cause of the change in access
Following orders from the US government, Anthropic is withdrawing access to its latest Mythos 5 and Fable 5 AI models. Access to other models is not affected and the company is working to “restore access as soon as possible”.
The directive from the White House, which was issued at 5:21 p.m. Eastern time, was to block access to next-generation AI models to “any foreign national, whether inside or outside the United States, including foreign national Anthropic employees” as per Anthropic’s blog post.
But with no way to apply this rule at the moment, access has been universally withdrawn. While we don’t have many details, Anthropic says it understands the US government is concerned about a “potential jailbreak” — but one that appears to be “narrow,” “non-universal” and not enough reason to pull access to the model, in Anthropic’s words.
“If this standard were adopted across the industry, we believe it would essentially halt all new model implementations for all frontier model providers,” explains Anthropic. “We apologize for this disruption to our customers. We believe this is a misunderstanding and are working to restore access as soon as possible.”
‘This must be a joke’
Fable 5 Suspended Indefinitely Due to National Security Concerns by r/ClaudeAI
Fabel 5 – the more limited, public version of the Mythos 5 AI model that Anthropic’s trusted partners have – has only been out in the wild for a few days, and users have been busy trying it out. It promises a significant step up in coding, reasoning and agent actions, and was put through a thorough vetting process before release.
Anthropic points out that it worked closely with authorities in the US and UK and with several third-party agencies and internal teams to make Mythos 5 and Fable 5 safe to use. Fable’s security measures are “significantly more effective than those of any previously implemented model,” according to Anthropic.
Apparently, these security measures are not enough for now. This story is definitely going to run and run as we discover more details about exactly what kind of jailbreak has been found, but it’s clear that Anthropic doesn’t think it’s as dangerous as the White House does.
Understandably, users aren’t impressed: according to one poster, it’s an “absolute nightmare scenario”, while another says “it’s got to be a joke”, and there’s plenty of speculation about what this means about other AI models (including those from China).
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