U.S. gas prices fall below $4 per gallon for the first time in months as the national average declines. Multiple outlets report that as of Thursday morning, the average cost of a gallon of regular gasoline is $3.99. This level comes after prices previously reached a peak above $4.50 in May. CBS News describes the $3.99 figure as the lowest since March 30, while Business Insider characterizes the drop as the first time gas prices are under $4 in months. The reports agree that the national average is moving downward from recent highs and that the current $3.99 price marks a notable milestone compared with recent months. Both sources frame the change as a reduction in the nationwide average rather than a specific regional event. Overall, the coverage indicates a continuing easing in gasoline costs at the national level, putting prices under the $4 threshold for regular fuel.