Anthropic Restores Claude Fable 5 After U.S. Lifts Jailbreak-Linked Export Controls

Anthropic is putting Claude Fable 5 back online worldwide. On June 30, the U.S. Commerce Department lifted the export controls it had imposed on Fable and its more tightly controlled sibling Mythos 5 about two and a half weeks earlier. Fable 5 returns to users on Wednesday, July 1, across...

Anthropic’s Fable 5 Model Jailbroken Within Days

Fable 5 is the supposed safe version of Anthropic's Mythos Preview, with guardrails to ensure that it can't be used to create cyberattacks. Well, that restriction was bypassed within days...

‘Dangerous’ AI Models Are Coming No Matter What

The US government crackdown on Anthropic’s Claude Fable 5 and Mythos 5 hides a glaring truth: AI models with advanced hacking capabilities will soon be the norm...

A Red-Team Study of Anthropic Fable 5 and Opus 4.8 Models

We evaluate the adversarial robustness of two frontier large language models LLMs developed by Anthropic, Fable 5 and Opus 4.8, against four families of automated jailbreak attack across 7 826 harmful intents spanning a ten-category harm taxonomy. Using the HackAgent red-teaming framework, hundre...

Claude Fable 5 and Mythos 5 “abruptly disabled” after US gov. ban

Anthropic has been ordered by the US government to cut off its newest Claude Fable 5 and Mythos 5 models for fear of abuse by adversaries. Reuters reports that Anthropic said it will "abruptly ​disable" its most advanced AI models for all users after the US government ordered it to suspend access...

U.S. Orders Anthropic to Suspend Fable 5 and Mythos 5 Access for Foreign Nationals

Anthropic said on Friday it will "abruptly disable" its most advanced artificial intelligence AI models, Claude Fable 5 and Mythos 5 , for all users after the U.S. government ordered it to suspend access to the models for foreign nationals, whether inside or outside the U.S., citing national...

Anthropic Releases Claude Fable 5, Its Most Powerful AI Yet, With Cyber Safeguards

On June 9, Anthropic released Claude Fable 5, the most capable model it has ever made, generally available. It also did something unusual: it shipped one model as two products, split not by capability but by a layer of safety classifiers. Fable 5 goes to the public. Its twin, Claude Mythos 5, the...