CAISI director Chris Fall resigns after three months leading U.S. AI safety testing

Chris Fall has resigned as director of the Center for AI Standards and Innovation, or CAISI, after roughly three months in the job. CAISI is the Commerce Department body that runs the federal government’s AI safety and evaluation work. Commerce spokesperson Benno Kass confirmed the departure but gave no reason.

Fall was appointed in April 2026 to lead CAISI, which was reorganized from the former U.S. AI Safety Institute. His exit leaves the government’s main technical center for testing frontier AI systems without a permanent leader as the administration weighs new rules on advanced and foreign-built models.

Arvind Raman, director of the National Institute of Standards and Technology, or NIST, will serve as acting CAISI director while Commerce reviews candidates for a permanent replacement. A Commerce official said Fall’s appointment was always intended to be temporary, which softens the optics of a three-month tenure but still leaves a gap at the top of federal AI evaluation.

The timing is awkward. CAISI is the body that would run any government testing regime for the frontier models now at the center of U.S.-China AI policy, and leadership churn at a barely reorganized office raises questions about continuity. Commerce did not detail a timeline for naming a permanent director, or what Fall will do next.

Whether Raman’s acting tenure is brief or stretches on will signal how much priority the administration puts on standing up CAISI’s testing mandate, or whether the center drifts while attention stays on legislation and export controls.