Does Ni(H2O)6 have Oh symmetry or Th?

I optimized a geometry of $\ce{Ni(H2O)6}$ using quantum chemistry and got a molecule which is symmetrical for the $\ce{Ni-O}$ distances as shown 
here:


![ball and stick model of Ni(H2O)6](https://i.stack.imgur.com/2BbQo.png)


In the literature it says that this complex has an $\ce{O\_h}$ point group, but this complex looks like it is $\ce{T\_h}$. Do I need to revise my group theory or is what I am looking at actually a $\ce{T\_h}$ point group?


