It looks like a model. The scale is good but a little off in places.
I don't believe I'm going to say this but:
The refuelling probe is too long and is missing the shroud where it joins the aircraft.
There are two antennas missing from under the nose, and at least one missing from the spine (not to
mention two antennas from either side of the tail...)
The underwing fuel tanks are the wrong shape.