How to get the probability of a text classficiation?

I have trained a text classification model with CreateML. I excited about the convenient tool and the precision of the model. However, there are some false positives. I realized, that the classification of the model has no probability parmater to decide, wether the app should take or drop the classification ot avoid false positives. Is there a way to get the probability value? Maybe I have to train the model in a different way? The model description in Xcode is quite clear: Text as input, classification string as output. Nothing more.