Hi Silky, jee-main cutoff trending set is varied year by year because it depends on the various factors like question paper level, attempted question by students etc.according to various institutes jee-main 2018 cutoff will be -

(Gen>=80) (OBC>=45) (SC>=32) (ST>=25)

if you want to know about the cutoff set according to the institutes then check it out given link :

https://engineering.careers360.com/articles/jee-main-cutoff

good luck