In this paper we introduce a determinant-like map $det^{S^3}$ and study some of its properties. For this we define a graded vector space $Λ^{S^3}_V$ that has similar properties with the exterior algebra $Λ_V$ and the exterior GSC-operad $Λ^{S^2}_V$ from \cite{sta2}. When $dim(V_2)=2$ we show that $dim_k(Λ^{S^3}_{V_2}[6])=1$ which gives the existence and uniqueness of $det^{S^3}$. We also give an explicit formula for $det^{S^3}$ as a sum over certain $2$-partitions of the complete hypergraph $K_6^3$.