This is the very first time that AIIMS and JIPMER are conducting admission to MBBS based on NEET scores and so it is difficult to predict. Now adding to that, compared to 2019, the NEET 2020 cut offs have changed considerably higher than expected. With the top score being 720 which is 19 marks greater than 2019's top score, it is difficult to predict chances. AIIMS of all branches has approximately 1100 seats and EWS has 10%. Which means, approximately 110 seats are allotted to EWS. And so with 645, you might have decent chances for a seat in AIIMS  Bhubhaneshwar. For a complete list of colleges that you may have a shot at, please use our College predictor: https://medicine.careers360.com/neet-college-predictor?icn=QnA&ici=qna_answer .