A group of cybersecurity experts have written an open letter to the US government, urging it to lift the export control order on Anthropic’s Fable and Mythos models. The models, which can help find vulnerabilities and make software more secure, have been restricted due to national security concerns. The experts argue that this move is dangerous and could allow adversaries to gain an advantage. The US government has suspended access to the models worldwide, sparking concern among cybersecurity defenders.