Hello Akash

As jee mains is giving you two chance in a year( January and in April).

Result will be based on the score in which you score maximum marks .

So cut off will be released after the April exam and April exam 's result.means their is no separate cut off for January .

And it is predicted that cut off will goes around 85 because only a certain number of students qualify for the jee advanced and seeing the January conditions and percentile score ; there is possibility that in April exam strength of students will be more ( so cut off may vary and can be fluctuate a lot).

So you have to wait till April exam results.

Good luck.