Be aware that AI is really bad at certain kinds of geometry. This can either go very well or very poorly. I'm not aware of many happy cases in the middle.

A simple test is that if the object you are modeling could be described by a brief python program (automating blender/CAD APIs), then the LLM will probably one shot it perfectly. If what you are modeling is a human face or bird, then the LLM is at best a clumsy apprentice. High Kolmogorov complexity is the common thread behind all things that LLMs will struggle with.

It can sometimes be easier to lean on a diffusion model and then trace over the results the old fashioned way. Diffusion completely sidesteps the geometry which helps with design speed.