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A Twitter thread discusses whether the entry window for AI capability competition has closed, citing the user experience of the Fable model, and argues that the window from February 2023 to February 2026 has closed, with most countries having permanently missed the opportunity.
Anthropic abruptly disabled access to its new Fable 5 and Mythos 5 models after receiving a US Commerce Department directive citing export controls and national security concerns over a reported jailbreak. The company disputes the severity of the claimed vulnerability.
A commentary piece speculates that Anthropic's Fable model may represent the ceiling of American AI progress, and that Chinese AI developers will soon outpace US frontier models due to faster iteration and distillation techniques.