I tried using Gemini 3 for OpenSCAD, and it couldn’t slice a solid properly to save its life, I gave up on it after about 6 attempts to put a 3:12 slope shed roof on four walls. Same job in Opus 4.5 and I’ve got a very nicely styled 600 square foot floor plan with radiused 3D concrete printed walls, windows, doors, shed roof with 1’ overhang, and a python script that translates the .scad to a good looking .svg 2D floorplan.

I’m sure Gemini 3 is good for other things, but Opus 4.5 makes it look infantile in 3D modeling.