Anthropic restored global access to its Claude Fable 5 artificial intelligence model on Wednesday. The move follows the US government's decision to lift export controls imposed on June 12, which had forced the company to suspend the advanced model.
The initial restrictions, applied to foreign nationals globally, led Anthropic to disable both Fable 5 and Mythos 5 due to an inability to verify user nationality in real time. Those controls were rescinded on June 30.
To meet regulatory requirements, Anthropic has deployed a new cybersecurity classifier designed to block specific behaviors that triggered the government action. High-risk requests are automatically redirected to the older Claude Opus 4.8 model. The company reports the new system neutralizes the previously identified vulnerability in over 99% of cases, though it may cause a temporary increase in false positives for benign coding and debugging queries.
Fable 5 is available immediately to Pro, Max, Team, and eligible Enterprise users on a temporary basis through July 7. Access is capped at 50% of standard weekly usage limits. Separately, Anthropic confirmed that access to the more restricted Mythos 5 model has been restored for a limited group of US organizations with explicit government approval.