Claude Fable is back!

Claude Fable is back!

Anthropic has lifted restrictions on Claude Fable 5 and Mythos 5 after a decision by the US government.

Fable will be available to Claude users again starting today.

Until July 7, the model is included in weekly limits. After that, access will move to API.

The restriction started after an Amazon report: researchers found a way to bypass Fable’s safeguards in cybersecurity tasks.

Anthropic says the bypass did not unlock Mythos-level capabilities. The company has already added a new safety classifier that blocks this method in more than 99% of cases.

Anthropic is also preparing a common standard for evaluating AI jailbreaks.