I have the same issue.
>>> import numpy as np
>>> np.__version__
'1.12.1'
>>> import torch
RuntimeError: module compiled against API version 0xb but this version of numpy is 0xa
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/odin/miniconda3/lib/python3.5/site-packages/torch/__init__.py", line 53, in 
<module>
    from torch._C import *
ImportError: numpy.core.multiarray failed to import

reinstall does not help