How should I evaluate my chances after being waitlisted at Carnegie Mellon versus Harvard?

Treat both waitlists as real possibilities but plan as though you will enroll elsewhere; neither decision provides a reliable basis for saying Carnegie Mellon is more likely than Harvard, or vice versa. A waitlist means each school found your application admissible and compelling, but it is not an indication that an offer is likely. The most useful comparison is how each institution fills its remaining enrollment needs after admitted students respond, not historical admit-rate data.

At Carnegie Mellon, movement can be especially tied to the enrollment picture within the undergraduate school or academic area connected to your application. The university may need to balance its class across those areas, so an applicant can be a strong candidate and still receive no offer simply because the relevant portion of the class is full. Your intended program and whether you would accept promptly can matter more than broad university-wide waitlist narratives.

At Harvard, the waitlist is used to complete a single entering class after the May enrollment deadline. Harvard can draw from a very large pool of applicants it already viewed as highly qualified, so selection from the list may reflect institutional needs that are not visible in an individual decision: class composition, academic interests, geographic representation, or other enrollment gaps. It is not a ranked line in which students can accurately infer their place.

For both schools, accept the waitlist offer by the stated deadline, submit only the updates each school permits, and make a deposit at your best available option by its deadline. A concise update is worthwhile only if it contains something material since you applied, such as a significant academic achievement, new responsibility, or meaningful project result. Do not treat continued interest alone, repeated emails, or a letter of intent as a way to convert uncertain odds into a predictable outcome.