See it's pretty hard to say . You should be mentioning your JEE mains rank not the percentile. Because as you are OBC. It's hard to predict what will be your rank. But if you ask me. With this much Percentile it will be quite hard to get IIIT Allahabad , any branch.

You should see your rank. And visit josaa website and see previous year closing rank for IIIT Allahabad. It will get clear to you that you will get a seat in it or not.

Hope it helps.

Thank you.