tf.keras.backend.in_top_k

Returns whether the targets are in the top k predictions.

predictions A tensor of shape (batch_size, classes) and type float32.
targets A 1D tensor of length batch_size and type int32 or int64.
k An int, number of top elements to consider.

A 1D tensor of length batch_size and type bool. output[i] is True if predictions[i, targets[i]] is within top-k values of predictions[i].