ag.algebraic geometry – Reductive groups over number rings

Let $F$ be a number field.

If $G$ is a reductive group over $mathcal{O}_F$ then we can look where $Gotimes mathbb{C}$ fits in the classification of complex reductive groups and get a “standard model” $G_{mathrm{st}}$. The algebraic group $G$ will differ from $G_{mathrm{st}}$ at only finitely many places.

Is it true that if we fix $Gotimes mathbb{C}$ and fix the places of difference then there is only finitely many reductive groups over $mathcal{O}_F$ we could have started with?