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Anthropic Restores Fable 5 and Mythos 5 After US Export Control Review Is Lifted

The US government lifts the export control directive on Anthropic's Fable 5 and Mythos 5 models. Fable 5 returns globally with a safety layer that falls back to Opus 4.8 on high-risk requests, featuring a 1-million-token context window and 80.3% on SWE-Bench Pro.

Tuesday June 30, 2026
Anthropic Restores Fable 5 and Mythos 5 After US Export Control Review Is Lifted

Summary

The US government lifts the export control directive on Anthropic’s Fable 5 and Mythos 5 models. Fable 5 returns globally with a safety layer that falls back to Opus 4.8 on high-risk requests, featuring a 1-million-token context window and 80.3% on SWE-Bench Pro.

Key Takeaways

Frequently Asked Questions

Q: What is this story about? A: The US government lifts the export control directive on Anthropic’s Fable 5 and Mythos 5 models. Fable 5 returns globally with a safety layer that falls back to Opus 4.8 on high-risk requests, featuri…

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