Anthropic suspends access to Fable 5 and Mythos 5 models

Fable 5 is described as a less powerful version of the company's Mythos model, which Anthropic had initially withheld due to concerns about its capability to exploit software vulnerabilities. The company claimed the U.S. government imposed export controls over fears that some of the models' built-in safeguards could be bypassed, a process known as 'jailbreaking.' Anthropic noted that the government had provided only verbal evidence of a potential narrow jailbreak and stated it disagreed that such a finding should lead to the recall of a commercial model.

The decision has left many non-U.S. governments and entities, including EU institutions, scrambling to secure access. In the UK, the situation has sparked discussions about technological sovereignty, with the minister for AI, Kanishka Narayan, emphasizing the importance of AI capabilities for national security and sovereignty.

Separately, India Inc. is advocating for increased AI self-reliance following the U.S. government's action. Anthropic's pre-IPO shares saw a 3.7% decline amid the news.