Also funny you should say you're too slow at 3D modeling but interested in using LLMs to do it. I'm on the other end. Not speed demon, but generally it's a lot faster to generate the geometry myself than to try to describe it. There's a lot of "how you got there" stuff that matters a ton for parametric modeling. If you want a CAD model that can easily be worked with you have got to be a bit smart about it, and I am not sure I see LLMs having that kind of spatial intelligence + deep physical world context soon. For one thing, it's a lot harder to do RL on.
It's not a CAD in the traditional sense, but since it's basically a scripting language for 3D primitives, it works surprisingly well in LLMs. And since it's just text, there's not even any MCP or agents necessary (though it can save some time).
Basic test : open a chatbot of your choice (I've tried Gemini 3.8), ask it for some basic box for your model of Arduino, or give it some napkin drawing with dimensions and ask it to give you an OpenSCAD code for it. Then paste to OpenSCAD, render, take a screenshot and mark on it what you don't like and prompt again. Usually it's pretty usable within 2-3 such iterations.
> Qwen4-Max Preview is now live on Alibaba Token Plan at a limited-time discounted price.
At first the work looked awesome, and once I started checking it out, I realized I would have to significantly alter the placements and manually draw most of the schematic to get it up to my standards (and hit the performance criteria of the board).