At what age are boys more liking to play with larger groups of boys while girls still tend to prefer to play with one or two friends?

Boys spend more time competing whereas girls spend more time talking. Up to age 7, boys tend to be friends with a few other boys, whereas girls play with a whole group of girls, but after age 7, boys tend to hang out in larger groups whereas girls gravitate towards a few best friends. Playing separately maintains and increases differences in how boys and girls interact.