Do you need an upgrade? None of us could tell that without listening to you, and the best opinion will come from your teacher.
All we can do on this board is share our experience and knowledge, to help you judge what's what. Here's mine....
I, too, started on an Antoni violin. The sort that costs around 35 quid from Tesco's, although the one I used was an e-bay bargain my sister picked up for less than that.
It sounded pretty dire, but then to be fair, so did I.

We both sounded a lot better after I put a set of Dominants on it instead of the rotten cheesewires it had when it arrived. A Hill E string improved it even further.
However, it was only meant to be a temporary measure, for the grade 1 challenge we did on the Forums, and I always planned to give it back.
This meant when I decided I'd like to keep on with the violining lark, I had to drop some pretty subtle hints to my husband, who duly bought me a Gliga Gems outfit from Elida Trading as a Christmas present.
The Gems took me through the actual grade 1 exam, and all the way up to grade 5, when I changed again to my current Miles Doubleday instrument.
I'm not planning on changing again.