# Losses

DL4J supports all available [Keras losses](https://keras.io/losses) (except for `logcosh`), namely:

*  mean\_squared\_error
*  mean\_absolute\_error
*  mean\_absolute\_percentage\_error
*  mean\_squared\_logarithmic\_error
*  squared\_hinge
*  hinge
*  categorical\_hinge
*  logcosh
*  categorical\_crossentropy
*  sparse\_categorical\_crossentropy
*  binary\_crossentropy
*  kullback\_leibler\_divergence
*  poisson
*  cosine\_proximity

The mapping of Keras loss functions can be found in [KerasLossUtils](https://github.com/eclipse/deeplearning4j/blob/master/deeplearning4j/deeplearning4j-modelimport/src/main/java/org/deeplearning4j/nn/modelimport/keras/utils/KerasLossUtils.java).