How about:

Insert into tblModels (Column1,Column2,Column3,Column4,...)

SELECT

n.COL1, n.COL2, n.COL3, n.COL4, ...

FROM tblReceivedData n

where

NOT EXISTS

(SELECT o.col1, o.col2 from tblModels o

where n.col1 = o.col1

and n.col2 = o.col2)