https://eecs.berkeley.edu/academics/undergraduate/cs-ba says that “Students entering UC Berkeley in fall 2015 or later must complete CS 61A, CS 61B, and CS 70 with a minimum cumulative GPA of 3.30 in those 3 courses in order to be guaranteed admission to the CS major.”
Of course, the threshold could be changed in the future. It was changed in the past depending on whether the number of students wanting to declare the major exceeded the major’s capacity and by how much.