Hello dear student,
As you asked so here I tell you that there is no official announcement for this that there will no separate examination for aiims . Aiims take its own entrance every year so for now yes aiims will take its own entrance test for MBBS aspirants as there is no announcement for conducting one common entrance for medical aspirants by aiims.
So I hope now your doubt is clear
Best wishes

All India Institute of Medical Sciences (AIIMS), New Delhi conducts AIIMS MBBS exam for admission to undergraduate courses offered by fifteen AIIMS institutes. The authority has announced AIIMS MBBS 2020 exam dates, which is to be held on May 30 and 31. AIIMS offers admission to a total of 1,205 MBBS seats available in institutes located in New Delhi, Bhopal, Bhubaneswar, Jodhpur, Patna, Raipur, Rishikesh, Guntur, Nagpur, Bathinda, Kalyani, Raebareli, Deogarh, Gorakhpur and Bibinagar (Telangana). Seven (7) seats in AIIMS, New Delhi are reserved for foreign nationals.
Qualifying exam

Aspirant must have completed their Class 12 from CBSE/ISC/State Board with Physics, Chemistry, Biology and English as the main subject

Minimum marks in Physics, Chemistry, Biology and English

For General and OBC aspirants 60% aggregate;
For SC and ST candidates 50% aggregate

For PwD candidates - 45% aggregate

Age limit

17 years as on December 31, 2020

You can also click on the link mentioned below for each and every information related to aiims
https://www.google.com/amp/s/medicine.careers360.com/articles/aiims-mbbs-eligibility-criteria/amp

Feel free to comment if you have any doubt
Good luck

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