Anthropic deploys Claude Sonnet 5, Fable and Mythos restored
18 days. That's how long the US government forced Anthropic to shut down Claude Sonnet 5. Now it's back.
Why it matters
Anthropic's Claude Sonnet 5 and frontier models (Fable, Mythos) are restored after an 18-day export control pause triggered by US federal review. This signals both regulatory compliance pressure on frontier AI labs and the resumption of capability deployment in a contested geopolitical environment.
The key facts
6 to knowClaude Sonnet 5 launched post-export control review
Fable and Mythos frontier models restored
18-day operational pause due to US government export control directive
Export control directive issued June 12, 2026
Pause forced temporary suspension of Anthropic's highest-capability systems
Federal export control review concluded
Go to the source
AI Newsartificialintelligence-news.com
Publisher excerpt: Anthropic has launched Claude Sonnet 5 and restored access to its Fable and Mythos frontier models following a federal export control review. The decision marks the conclusion of an eighteen-day operational pause triggered by a US government export control directive on June 12, which forced the…