Claude Fable 5 hit 95% SWE-bench Verified before the US government forced a global shutdown 72 hours after launch. Benchmarks, API details, and what to do now.

Anthropic confirmed tonight that it has disabled access to Claude Fable 5 and Claude Mythos 5 to all customers, following an export control directive from the US government.

“The government believes it has become aware of a method of bypassing, or ‘jailbreaking’ Fable 5,” the company said in a blog post.