Anthropic Restores Global Access to Fable 5 After Export Controls Lifted

Anthropic has restored access to its Claude Fable 5 model after U.S. export controls were lifted, announced in a company update. The restrictions, imposed on June 12, required the company to suspend access to both Fable 5 and Mythos 5 while compliance procedures were reviewed. As of June 30, the controls have been removed, allowing Fable 5 to return to global availability across the Claude Platform, Claude.ai, Claude Code, and Claude Cowork starting July 1.

During the suspension, Anthropic worked with government and industry partners to address concerns that led to the export directive. The issue arose after Amazon researchers reported a method to bypass certain safeguards in Fable 5 that allowed it to identify software vulnerabilities. Anthropic confirmed that several other models, including Claude Opus 4.8 and GPT 5.5, could produce similar results. The company has since trained an improved safety classifier that blocks the reported technique in over 99 percent of cases.

Access to Mythos 5 has also been restored for a group of U.S. organizations following government approval on June 26. Anthropic continues to coordinate with authorities to expand access within its Glasswing cybersecurity program. The company is also collaborating with Amazon, Microsoft, and Google to develop a shared industry framework for assessing the severity of AI jailbreaks and improving safety standards.

Anthropic stated that it will strengthen cooperation with U.S. government agencies by providing early access to future models for evaluation, sharing information on new safeguards, and supporting joint research on AI security. The company expects to re-enable Fable 5 access on AWS, Google Cloud, and Microsoft Foundry in the coming days.