Anthropic AI Updates: June 13, 2026

1. Anthropic Says US Government Ordered It to Suspend Fable 5 and Mythos 5 Access

Anthropic. Anthropic disclosed that the US government issued an export control directive requiring it to suspend all user access to its Fable 5 and Mythos 5 models, citing national security concerns after officials identified a potential method for bypassing the models’ safeguards. The company said it is complying with the legal order but disagrees with it, arguing the vulnerability is narrow and widely present in competing systems. Anthropic warned that applying such a standard across the industry would effectively halt new model deployments. Source

2. Claude Code v2.1.175 Adds enforceAvailableModels Managed Setting

Anthropic. Claude Code v2.1.175, tagged June 12, introduced a new enforceAvailableModels managed setting that constrains the default model to the availableModels allowlist. The control prevents user or project settings from widening the allowed model set, giving administrators tighter governance over which models can be selected in managed deployments. Source