The lack of disclosure of details regarding the Anthropic-US government agreement to lift export restrictions on Fables has sparked controversy.

PANews reported on July 1st that, according to Bloomberg, Anthropic has had its external access restrictions on its Fable 5 and Mythos 5 models lifted after reaching an agreement with the US government. However, the specific agreements between the two parties regarding security standards and technical modifications have not been disclosed. Previously, the ban stemmed from Amazon's feedback to the US government that Fable's security measures could be bypassed. Anthropic subsequently addressed these shortcomings with the support of CAISI, an agency under the US Department of Commerce, and agreed to deepen its cooperation with CAISI, providing computing power and a security team to participate in testing. The report points out that this export control case, reached through private communications and closed-door negotiations, lacks transparency, making it difficult for companies to predict under what standards they might face further blockades in the future.