# خبر
Fable’s Return and Fallout Claude Fable 5 and the more powerful Claude Mythos 5 are back, three weeks after Anthropic suspended the models due to an export control directive from the U.S. Department of Commerce.
What’s new: Anthropic
restored customer access to Claude Fable 5 via the Claude API, Claude Code, and other Anthropic-controlled platforms on July 1. As part of its agreement with the U.S. government, Anthropic added additional guardrails to the model blocking some cybersecurity queries and routing them to the less capable Claude Opus 4.8.
What happened: The redeployment of Claude Fable 5 and Mythos 5 brings a resolution to the most high-profile conflict between the U.S. government and an AI company so far this year. However, the dispute didn’t only involve Anthropic, but also Amazon, Google, Microsoft, and OpenAI. (Disclosure: Andrew serves on Amazon’s board.) Here’s a timeline of when the models were released and why they were suspended and reinstated.
Anthropic
debuted Claude Mythos Preview for select government and tech partners in April. The model was released only to companies that maintain critical infrastructure to allow them to identify security vulnerabilities and patch them.
Two months later, on June 9, Anthropic
released Claude Fable 5 to customers worldwide. Its guardrails prevented certain queries related to cybersecurity and biological research; the model also controversially
degraded its responses about how to build powerful AI models.
Amazon researchers used Claude Fable 5 to obtain information about how to conduct a cyberattack, which
led to the directive. Anthropic contends that any sufficiently capable model, including its own Claude Opus 4.8 and those from other providers, could identify the same vulnerability and produce an exploit.
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