This is actually a good diagnostic of whether the model is skimping on the thinking loop. Try raising thinking effort and it should get it right. Of course, if

This is actually a good diagnostic of whether the model is skimping on the thinking loop. Try raising thinking effort and it should get it right. Of course, if you're running this in a coding harness with a whole lot of extraneous context, the model will be awfully confused as to what it should be thinking about.