Two weeks ago, the U.S. government issued an export control directive requiring A to stop providing Claude Fable 5 and Claude Mythos 5 models to all non-U.S. citizens. The reason is that these models are very powerful in the field of cybersecurity, and Amazon's security research team discovered a jailbreak method for the models, which allows ordinary users to jailbreak and use models such as Claude Fable to launch cyber attacks.
In view of potential compliance issues, Company A directly suspended the provision of Claude Fable/Mythos 5 models globally, because according to the US government's export control directives, even non-US citizens in the United States cannot access it. It is difficult for Company A to distinguish the identity of users by simple technical means, so Company A finally decided to stop all models, and even US users or institutions cannot use them.
Access to Claude Mythos 5 now restored on a very limited scale:
According to the latest announcement from A, the U.S. government has notified the company that it can open the Claude Mythos 5 model to a small number of organizations that operate and maintain infrastructure in the United States. After receiving the notification, A quickly restored access rights for these specific organizations. A company is continuing to actively communicate with the U.S. government to expand access to the Claude Mythos 5 model, and is also looking for ways to make Claude Fable 5 accessible again as soon as possible.
Therefore, it is actually inaccurate to say that the model has lifted the restrictions. It is more like the U.S. government is considering restoring access rights to specific organizations based on actual security needs. Companies like Microsoft that maintain Windows and Windows Server will definitely be able to obtain access rights, but ordinary developers who want to regain access rights still need to wait, and there is no restoration timetable for the time being.