What are MITs rival schools?

Answer 1

Harvard and Caltech.

I completely disagree.

Caltech may be in the top ten engineering schools but certainly not top five...while Harvard is not even in the top ten.

The best answer is Stanford and UC Berkeley.

That depends how you interpret "rival". From a ranking/academic perspective, you may be right (though I feel Caltech is comparable to MIT). From a personal/historic perspective, MIT has a long history of hacking with Caltech and Harvard (MIT stole the caltech cannon!). In the MIT student culture, Caltech and Harvard are ingrained as the main rivals.