Film critic Roger Ebert described Sphere as "a watered-down take on the sci-fi classic Solaris by Stanislaw Lem, which was made into an immeasurably better film by Andrei Tarkovsky".
O crítico de cine Roger Ebert describiu Sphere como "unha versión diluída do clásico de ciencia ficción Solaris de Stanisław Lem que se converteu nun filme inconmensurablemente mellor por Andrei Tarkovskii".