Opus 4.5 seems to be a step above every other model in terms of creating SVGs. Before most models couldn't make something that looked half decent.
But I think this shows that these models can improve drastically on specific domains.
I think if three was some good datasets/mappings for spacial relation and CAD files -> text then a fine tune/model with this in its training data could improve the output a lot.
I assume this project is using a general LLM model with unique system prompt/context/MCP for this.