Sforno on Genesis 13:12/ספורנו על בראשית י״ג:י״ב

1אברם ישב בארץ כנען, even though the city of Sodom and its satellite towns are on the border of the land of Canaan, the people living in those cities at that time, were not Canaanites. It was therefore in order for the Torah to write that Avram- as opposed to Lot- settled in the land of Canaan. He settled in the part of the land inhabited by Canaanites. They were not as evil as the Sodomites. Avram did not move close to the boundary of Sodom at all.