One hundred twenty-five grams is only five grams more than this site's one-cup all-purpose flour reference. The calculated result is about 1.04 cups. In practice, weigh 125 grams or use one level cup plus a small measured addition.
For all-purpose flour, the calculation is 125 ÷ 120 = 1.04 cups. If you use cups, fill each measure the same way from start to finish.
Do not change to a lighter flour type just to reach a simpler cup fraction. Select the flour named in the recipe because protein level and behavior matter as much as volume.