Let Weight-based model merging: We experiment with SLERP , which applies spherical interpolation to fuse model parameters. The goal is to find optimal coefficients λ 1 and λ 2 so that the merged model Θ (merge) = λ 1 τ 1 + λ 2 τ 2 retains the capabilities of the independent models. The coefficients are given by sin((1-λ)•ρ) sin(ρ)