When both chambers of the US Congress pass a bill banning or pausing the development of advanced frontier AI models

My 10th percentile prediction for both chambers of the US Congress to pass a bill banning or pausing the development of advanced frontier AI models is 12th August 2033, driven by the reality that overcoming bipartisan opposition and geopolitical competition with China would require an extraordinary catalyst, such as an uncontained catastrophic failure or critical infrastructure collapse directly caused by frontier AI.

The question resolves on the date when both the House of Representatives and the Senate have each passed the same bill, resolution, or joint measure in identical legislative text that would ban or pause the development of advanced frontier AI models. Presidential signature, enactment into law, or implementation is not required. Qualifying legislation may come from any Congress. To count, the legislation must impose a substantive prohibition or pause on the development of advanced frontier AI models; mere reporting, disclosure, auditing, labeling, licensing, export-control, deployment, release, or use restrictions do not count unless they actually prohibit or suspend model development itself. A temporary pause counts only if the text actually bars development activities for a defined period or until a condition is met.