According to AI watcher Andrew Curran, Anthropic has reportedly finished training a more capable successor to its suspended Mythos 5 model. The company has not confirmed the model's existence, name, or capabilities, but Curran describes the system as stronger than Mythos 5. The supposed new system could ship as Mythos 5.1 or Mythos 6, or remain internal for further development. This development comes nine days after US export controls forced Anthropic to suspend both Mythos 5 and Fable 5 on June 12.
Commerce Secretary Howard Lutnick sent the directive to Anthropic chief Dario Amodei on June 12, citing national security concerns. The order barred every foreign national, including Anthropic's own foreign-born staff, forcing the firm to disable both models worldwide. The government flagged a method for bypassing Fable 5's safeguards, which Anthropic reviewed and called narrow. The company is still working to reverse the export controls, with the order following a reported Amazon warning to officials.
According to Anthropic, approximately 50 partners have used early Mythos models to find more than 10,000 high- or critical-severity software flaws. Fable 5 ships with heavy safeguards for public use, while Mythos 5 runs with fewer security restrictions through Project Glasswing, the firm's vetted cybersecurity program. The suspension order limits today's lineup, with several expecting an iterative upgrade to the new successor.
Curran argues that halting deployment does little to slow progress and may even speed it up by freeing resources. He points to open-weights rivals such as Z.ai's GLM-5.2, which matches far larger closed models on coding tasks at a fraction of the cost. The successor's path remains uncertain, with Anthropic continuing to seek restored access for both suspended models and having not addressed latest developments publicly. The situation highlights what analysts are calling 'AI psychosis' - a cultural and psychological dependency pattern emerging around AI adoption.
