That’s not the case in even the entry level classes since they’ve significantly reduced the availability of unreserved seats and made BA CS a direct admit via CDSS. As an example, the class sizes for Fall 2025 for the lower div CS courses.
CS 61A: 744
CS 61B: 261
CS 61C: 292
OP - the other thing to know about these classes are that they are extremely well resourced and well run with some of the largest cohorts of course staff on campus.
OP - I’d even argue that there is a critical mass of CS students on campus that generates significantly higher academic, research, and career opportunities. You’ve got into some great schools and IMO the choice lies between Berkeley and Caltech depending on the type of educational environment you like.