The US government has reversed its decision to restrict exports of Anthropic's most advanced artificial intelligence tools, the company announced. Beginning Wednesday, July 1, 2026, Anthropic will restore access to Claude Fable 5 and Mythos 5 after the US Department of Commerce lifted the export controls, according to a social media post by Anthropic.
Background of the Ban
On 12 June 2026, Anthropic abruptly suspended access to Fable 5 and Mythos 5 worldwide after the US government ordered export controls over national security concerns. The authorities feared that the models could be used by hackers to exploit weaknesses in computer systems. Anthropic previously stated that US authorities had not pinpointed specific concerns about its technology even as the suspension was imposed.
The Models at Issue
Fable 5 and Mythos 5 are two of Anthropic's AI models built on its Claude platform, a rival to OpenAI's ChatGPT and Google's Gemini.
- Fable 5: Targeted at the consumer market, capable of deep reasoning and performing complex tasks independently.
- Mythos 5: Designed for businesses and cybersecurity experts, said to be able to identify vulnerabilities in computer code and exploit them.
| Model | Target Market | Key Capability |
|---|---|---|
| Fable 5 | Consumers | Deep reasoning, independent complex tasks |
| Mythos 5 | Businesses & cybersecurity | Identify and exploit code vulnerabilities |
Anthropic's Response
Anthropic disagreed with the initial ban. The company explained that the government's concern stemmed from a potential method of 'jailbreaking' Fable 5—bypassing safety restrictions to unlock features. However, Anthropic argued that this should not warrant a global recall.
"Our understanding is that the government believes it has become aware of a method of bypassing, or 'jailbreaking' Fable 5. However, we disagree that the finding of a narrow potential jailbreak should be cause for recalling a commercial model deployed to hundreds of millions of people."
Timeline of Events
| Date | Event |
|---|---|
| 12 June 2026 | US orders export controls on Fable 5 and Mythos 5; Anthropic suspends access worldwide |
| 1 July 2026 | US Department of Commerce lifts export controls; Anthropic begins restoring access |
The BBC has contacted the Department of Commerce for comment. The reversal marks a rapid shift in US AI policy, with export controls lifted on the same day they were removed, just weeks after the initial suspension.
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