--- title: "I asked Claude and GPT-5.5 to design my 3D prints, and they failed in completely opposite ways" url: https://daily.dev/posts/i-asked-claude-and-gpt-5-5-to-design-my-3d-prints-and-they-failed-in-completely-opposite-ways-1ck9d0syc source_url: https://www.xda-developers.com/asked-claude-gpt-design-3d-prints-failed-opposite-ways type: article source: "XDA Developers" published: 2026-06-10T23:04:37.091Z updated: 2026-06-17T15:50:39.112Z tags: ["llm", "genai", "claude"] reading_time: 10 upvotes: 0 comments: 0 language: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # I asked Claude and GPT-5.5 to design my 3D prints, and they failed in completely opposite ways **[XDA Developers](https://daily.dev/sources/xda-developers)** · 10 min read · 0 upvotes · 0 comments ## Summary A hands-on comparison of Claude Opus 4.8 and GPT-5.5 generating OpenSCAD files for 3D printable parts across three tasks: a phone stand, a circular microphone array enclosure, and a remote cradle. The two models failed in opposite ways — GPT-5.5 consistently did better research (finding real coordinates, downloading CAD files) but produced geometrically broken parts that ignored gravity or had disconnected components. Claude produced cleaner, physically valid geometry but often invented or refused to find real dimensions. Neither model reliably combined good research with correct physical reasoning in a single pass. The write-render-look-fix loop helped, and light human intervention fixed most issues quickly. The conclusion is that LLMs are a useful starting point for parametric CAD work with human oversight, but cannot reliably one-shot a functional design. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [OpenSCAD LLM Benchmark: Building the Pantheon](https://daily.dev/posts/openscad-llm-benchmark-building-the-pantheon-awy0rhlu0) · Hacker News · 0 upvotes · 0 comments - [Why GPT-5.4, Claude, and Gemini can’t agree on basic, real-world facts](https://daily.dev/posts/why-gpt-5-4-claude-and-gemini-can-t-agree-on-basic-real-world-facts-q7pcokdcw) · The New Stack · 0 upvotes · 0 comments --- Tags: [#llm](https://daily.dev/tags/llm), [#genai](https://daily.dev/tags/genai), [#claude](https://daily.dev/tags/claude) [View this post on daily.dev](https://daily.dev/posts/i-asked-claude-and-gpt-5-5-to-design-my-3d-prints-and-they-failed-in-completely-opposite-ways-1ck9d0syc)