My brother studied at IIIT Guwahati in the 2017 batch and each of them received a Lenovo Laptop, and the model was within G50–80. The laptop they provide is of very decent and academic-centric specification. It is sufficient enough to get you going with all your assignments and presentations, but don't expect anything fancy or stylish.
However, the sad news is from 2018 onwards, IIIT Guwahati stopped providing the students with laptops due to the following reasons:
Now, students are required to bring their own laptops to carry out their academic projects. Also, many students have their own laptops before even getting into college adding to the benefit. At last, it is highly advisable to buy your own laptop which is dual booted with Windows and Ubuntu.