The workaround exposed gaps in the model's guardrails. Fable, a public-facing version of Anthropic's more capable Mythos system, is designed with restrictions to prevent harmful uses, including...

Restoring public access to Anthropic's first Mythos-class model marks the end of weeks-long negotiations

The U.S. government slapped Anthropic with export restrictions days after the Fable 5 model was released to the greater public over cybersecurity safety concerns.