An Open Letter

On Transparent AI Cyber Protections

June 14, 2026

Dear Secretary Lutnick and National Cyber Director Cairncross,

We, the undersigned executives and technical leaders from across the United States and its allies, write to you to ask you to lift the export control directives on Anthropic’s Fable and Mythos large language models and commit to an open, scientific and transparent process of handling AI risk assessments in the future.

First, we would like to state that we believe that:

It is our understanding that underlying model capabilities in the original research that triggered this action:

As a result, this action has taken the best models away from defenders, created market uncertainty, and risked America’s AI leadership without any real risk to justify it.

Not all of us agree that AI regulation is the right way forward. But if this Administration’s laudable goal of securing our nation’s critical infrastructure is going to include models being regulated, then the regulations should be:

  1. Grounded in scientific evaluations developed with input from industry and academia;
  2. Created through a democratic rule-making process;
  3. Enforced transparently and fairly with appropriate time given to remediate; and
  4. Used only to the minimal extent necessary to ensure the safety of the American public.

Thank you for your consideration and partnership in helping us maintain America’s lead in technology while protecting critical software and systems.

Signed,

Affiliations are included for reference only and do not indicate organizational endorsement.