# Anthropic's Fable 5 and Mythos 5 Are Coming Back Online After 18-Day Export Control Standoff **Source:** https://glitchwire.com/news/anthropics-fable-5-and-mythos-5-are-coming-back-online-after-18-day-export-contr/ **Published:** 2026-07-01T00:22:21.955Z **Author:** AI Desk ยท Glitchwire **Categories:** AI, Policy ## Summary The Commerce Department has withdrawn its June 12 export control directive, ending a dramatic confrontation over Anthropic's most capable models. ## Article The 18-day export control standoff between Anthropic and the Trump administration is over. The Commerce Department has lifted the restrictions that forced Claude Fable 5 and Mythos 5 offline on June 12, according to a letter from Commerce Secretary Howard Lutnick to Anthropic co-founder and Chief Compute Officer Tom Brown. Anthropic [announced](https://www.axios.com/2026/06/30/trump-anthropic-ai-model-fable-restrictions) on Tuesday that it received notice of the withdrawal and would begin restoring access to both models tomorrow. The company thanked users for their patience and acknowledged those who helped negotiate the resolution. ## What Anthropic Agreed To The path back to public availability came with conditions. According to Lutnick's letter, Anthropic has committed to proactively detect and address security risks, work with the government on protocols and standards for future model releases, and notify federal officials of any malicious activity involving the models. The Bureau of Industry and Security also conducted a fresh assessment of diversion risks. That evaluation, combined with Anthropic's commitments, satisfied the Commerce Department enough to withdraw the June 12 order entirely. ## How We Got Here The confrontation began just three days after Anthropic launched Fable 5 as the first public version of its Mythos-class models. Commerce Secretary Lutnick sent an export control directive to CEO Dario Amodei on June 12, ordering Anthropic to suspend access to both Fable 5 and Mythos 5 for any foreign national, anywhere in the world. The directive cited national security authorities under the Export Control Reform Act of 2018. The trigger was a reported jailbreak technique that could bypass Fable 5's safety filters, potentially exposing the advanced cybersecurity capabilities of the underlying Mythos architecture. Anthropic disputed the severity, calling it a narrow bypass rather than a universal jailbreak, and [argued that the same technique](/news/the-us-government-just-suspended-access-to-fable-5-and-mythos-5-the-fallout-will/) could work on other publicly available models. Unable to filter users by nationality in real time across cloud platforms like AWS Bedrock and Google Cloud, Anthropic disabled both models for everyone. ## The Negotiations Tom Brown emerged as the key figure in the resolution. According to [Wired](https://www.wired.com), Brown began leading Commerce Department talks on June 15, with CEO Dario Amodei taking a hands-off role. The White House had grown frustrated with Amodei's approach. By June 19, President Trump was publicly saying Anthropic was no longer a national security threat. Brown's technical background likely helped. He co-founded Anthropic in 2021 after leading the GPT-3 engineering team at OpenAI. As Chief Compute Officer, he runs the company's infrastructure operations. Last week, the government took a partial step toward normalization, allowing Mythos 5 to be restored to a limited group of U.S. organizations that operate and defend critical infrastructure. Fable 5, the general-purpose model, remained blocked until today's announcement. ## The Broader Implications This episode established that the Commerce Department can and will use export control authority against commercially deployed AI models. It also showed what that power looks like in practice: global service disruption, enterprises scrambling for alternatives, and developers watching automated workflows freeze mid-task. The resolution sets a template for future disputes. Anthropic accepted ongoing coordination with the government, proactive security monitoring, and information-sharing requirements. Whether other frontier AI companies will face similar demands remains an open question. [OpenAI launched GPT-5.6](/news/openai-launches-gpt-56-sol-under-government-gated-release-the-new-normal-has-arr/) under a limited preview with government-approved customers last week, suggesting the ad hoc regulatory environment isn't going anywhere. For Anthropic, the immediate task is restoring service. For the industry, the task is figuring out what the rules actually are. --- **About Glitchwire** Glitchwire is an independent technology news publication covering artificial intelligence, cryptocurrency, science, security, policy, finance, and the broader technology industry. 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