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My experience is it often produces terrible diagrams. Things clearly overlap, lines make no sense. I'm not surprised as if you told me to layout a diagram in XML/YAML there would be obvious mistakes and layout issues.

I'm not really certain a text output model can ever do well here.

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resters 6 days ago | parent | next [-]

FWIW I think a multimodal model could be trained to do extremely well with it given sufficient training data. A combination of textual description of the system and/or diagram, source code (mermaid, SVG, etc.) for the diagram, and the resulting image, with training to translate between all three.

	▲	bangaladore 6 days ago \| parent [-]
		Agreed. Even simply I'm sure a service like this already exists (or could easily exist) where the workflow is something like: 1. User provides information 2. LLM generates structured output for whatever modeling language 3. Same or other multimodal LLM reviews the generated graph for styling / positioning issues and ensure its matches user request. 4. LLM generates structured output based on the feedback. 5. etc... But you could probably fine-tune a multimodal model to do it in one shot, or way more effectively.

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behnamoh 6 days ago | parent | prev [-]

I had a latex tikz diagram problem which sonnet 3.7 couldn't handle even after 10 attempts. Gemini 2.5 Pro solved it on the second try.

	▲	gunalx 6 days ago \| parent [-]
		Had the same experience. o3-mini failing misreably, claude 3.7 as well, but gemini 2.5 pro solved it perfectly. (image of diagram without source to tikz diagram)