These models were trained in an unsupervised way, and thus cannot be used with the "predict" mode of fastText.

The .bin models can be used to generate word vectors for out-of-vocabulary words:

  > echo 'list of words' | ./fasttext print-vectors model.bin

or

  > ./fasttext print-vectors model.bin < queries.txt

where queries.txt is a list of words you want a vector representation for.