Dear Student,

There so many IIIT institutes and each of them has a different cut off marks (it is different for every caste too). The cut off marks and closing rank is different for every streams too. The authorities use the jee main cut off marks for them as a minimum required number.

Visit this link for the details information, (Here the opening and closing rank for top iiits are included);

https://engineering.career360.com/articles/jee-main-cutoff-for-top-iiits

Thank You.