Anthropic Pulled Fable 5 and Mythos 5: What the Ban Means (opens in new tab)

Anthropic disabled Fable 5 and Mythos 5 on June 12 after a US government export-control order The order bars foreign nationals, so every customer lost access while compliance is sorted out The trigger was a narrow jailbreak that asked the model to fix flaws in a codebase Opus 4.8 and every other Claude model still work, so that is where I moved my pipelines Six days after I started routing real work to Claude Fable 5, it vanished. On June 12 Anthropic disabled both Fable 5 and Mythos 5 worldw...