IIT delhi shall provide admissions by JEE advanced  and for that candidate has to pass JEE mains and be amongst top 2.24 lakh students.

Now coming to CSE, this sis most sought after branch at all top IITs and NITs and hence, the cutoff surges well below top 200 ranks for JEE advanced.

For open category, the opening rank for CSE is AIR 4 and closes near to AIR 104, now these numbers can vary every year depending on difficulty level of exam and number of students appearing, hence to score AIR 100 and ranks under it, you must score atleast 305+ to be on safe side and anything above 320 shall guarantee you a seat at top IIT delhi, CSE branch.

All the cutoffs as per past trends for all branches at IIT delhi given below:

https://engineering.careers360.com/articles/jee-advanced-cutoff-for-iit-delhi

IIT Delhi provides admission through Jee advanced and the exam pattern of this exam keeps on changing every year so it is quite difficult to provide any marks and rank range but to get admission in top IITs and in top branches like CS, ME etc better to get more than 60% as ths would be the safest score to reserve seat there.

Hope this helps!!!