Hello Amit

AIIMS Delhi is one of the top government medical college in India. From all over the India, people come here for treatment. The doctors here are very expert in their field. Almost every medical aspirant want to study there. Till 2019, there is separate exam for AIIMS but form 2020, NEET is the only exam for selecting students from UG courses in AIIMS, JIPMER and other government colleges. Now, as there is only single exam, the competition also increases. Approx 685 - 690 marks will be able to get you in AIIMS Delhi. If you are getting 400 marks, you have to increase your performance to get atleast minimum marks to cross the cutoff for AIIMS. The cutoff changes every year, so a score of 660 - 680 will get you a seat in your desired college.

Hope this helps and all the best for future.