BHi Manoj,
The cut-off given by AIIMS for passing in the mock round is
AIIMS- 26850
Category rank-688
Since your rank comes under the cut-off you're eligible for mock round (counselling). Further selection of candidates will be done in this round. As the number of candidates selected for the mock round are four times than that of the seats available.
To check out last year's cut-offs of AIIMS colleges across India you can just click on the link below:-
https://medicine.careers360.com/articles/aiims-mbbs-cut-off
All the best!
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