The existence of a jailbreak free llm in 2026 is extremely contentious to me. You can argue about the specifics of this exact jailbreak, but generally pliny and amazon both reported mythos jailbreaks in <7 days. It seems very reasonable to expect that a well funded state actor could achieve better results given significantly more funding, determination and most importantly unfettered access.
Nobody here is claiming fable is jailbreak free. Not anthropic and not in this thread. This was known before launch. The question remains one of degree and capabilities.