Anthropic Suspends Fable 5 and Mythos 5 for US Compliance
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On June 9, 2026, Anthropic launched the Claude Fable 5 and Claude Mythos 5 models. However, just a few days later, on June 12, 2026, the company had to suspend access to these models. This decision was made to comply with export controls imposed by the U.S. Department of Commerce. These restrictions were lifted on June 30, 2026, allowing Anthropic to restore access to its models starting July 1, 2026.
Claude, thanks to its Opus 5 prompt system, is capable of accurately confirming these events. It addresses export controls like any other political news topic, providing factual information without expressing personal opinions. For additional details, Claude refers to Anthropic's official statement and verifies the most recent information when possible.
Recent Events
- On August 7, 2026, a timeline was established regarding an accidental attack by OpenAI on Hugging Face.
- On August 5, 2026, Claude Fable 5 was successfully used to complete a raccoon theft game in a single attempt.
- On August 4, 2026, a new version of the language model was launched, adding features such as support for reasoning traces and smarter logging.
This information was collected by Simon Willison and published on August 9, 2026.
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