I keep seeing people in this thread lamenting that "There is no good way for LLMs to design/generate parametric STEP models yet", while I've spent the past 6 months working on this exact problem.

So, yesterday, I've had Astra build a moving assembly of Babbage's difference engine with it with 400+ parts and real parametric geometry, and you can also download the full STEP model assembly there.

https://aetheris-difference-engine-showcase.yuechenli.worker...

And here's a STEP file that I've had GPT reconstruct of a popular phone with exact parametric dimensions just from the 2D drawing, took like an hour:

https://github.com/yuechen-li-dev/Aetheris/blob/master/sampl...

Completely free and open source, you can use your own Claude/Codex to start vibe-coding and generate perfect STEP file right now.

So, no, it's not a matter of time on "when can AI do CAD", we are already here.

Sorry if I sound a little frustrated and a bit too self-promotion-y, but I just really want people who says "I wish this capability exists sometimes in the future" to know that it already does, and you can use it right now, for free.