When using 3D Make on the Kimi web client/desktop client, a dedicated diffusion model is invoked to generate 3D models; Kimi 3.1 Pro is not asked to perform the modeling itself—it handles the other work involved in generating the 3D model. However, if you are using the official Kimi Code or some other harness application, when you ask it to operate 3D software and perform modeling on its own, it normally completes the modeling step by step itself, because this requires operating a computer or writing scripts, rather than routing the task to a dedicated diffusion model.