How true is the GPA deflation at UC Berkeley?

You can look up grade distributions at these web sites:

https://calviz.berkeley.edu/t/OPAP/views/GradesbyCourse/GradesDB?:isGuestRedirectFromVizportal=y&:embed=y
https://www.berkeleytime.com/grades

Older thread on grade distributions (grade distributions may be different now):

http://talk.collegeconfidential.com/university-california-berkeley/2071932-grade-distributions-in-prerequisite-courses-for-gpa-based-goals.html

Other colleges for comparison:

http://talk.collegeconfidential.com/pre-med-topics/2074436-some-colleges-have-grade-distribution-information-available-by-course.html