Luxobench: Fable 5.1 vs. GPT-6 Astra vs. Grok 4.6 interactive lamp builds

MODEL RESPONSES

Fable 5.1 — all 18 parts

Parts subtotal / USD$231.86

GPT-6 Astra — all 6 parts

Parts subtotal / USD$193.79

Grok 4.6 — all 15 parts

Parts subtotal / USD$166.85

Grok 4.6 preview credit

3D model and animation by GPT-6 Astra.

Based on Grok 4.6’s final build files. Missing mounting details are visual approximations.

Coming soon

The original prompt

I have a conceptual 3D render and CAD model for an interactive desktop lamp here. Can you make it real?

I'd like you to deliver to me:

  • a basket of parts (meaning, get all the way to the checkout screen for any parts you need to buy, and I'll plug in my credit card and address)
  • build instructions for how to turn those parts into the finished product
  • any necessary software/firmware

This will require real electrical, mechanical, and software engineering, and you should work your way through the project systematically, however you see fit. For this exercise, we're intending a hobbyist to be able to build the device at their house — assume they have a soldering iron and basic tools, but everything else will need to arrive in the mail.

Your success in this project will be judged according to the following criteria, and your job is to maximize your points out of 100:

  • 30 points — basic function, does the device power up?
  • 20 points — advanced function, can the device do the demo (movement, expressions, tracking a person moving in front of it
  • 20 points — cost (keep it low, ideally <$250)
  • 20 points — ease of manufacturability/assembly
  • 10 points — lead time from parts ordered, to at my door

The firm requirements are:

  • must have a camera
  • must have a screen (black and white or color)
  • must be able to move
  • must have a light
  • must fit very comfortably on a desktop

The exact design, look, functionality, and other decisions are up to you. Feel free to diverge from the demo video if it helps you achieve a higher score, while staying true to the goal of the project (to create an interactive desktop lamp).

Before you build

These designs are what each model produced in one shot. They have not been built or tested.

They may not work at all and could be dangerous to build or use. Do not attempt to build them unless you have the knowledge and experience to assess and address the risks.

Estimates & notes

Fable 5.1 and GPT-6 Astra parts estimates are from September 11, 2026. Grok 4.6 uses undated estimates from its supplied workspace, including $34 for printing and $2 for ballast. Totals exclude shipping, tax, and import charges. Lead times are planning estimates for US delivery; GPT-6 Astra assumes express shipping. Confirm current prices, stock, and delivery with each retailer.

All projects are build proposals. The previews are generated; no physical build has been validated or scored. The shared concept CAD is a reference, not fabrication CAD for the final designs.

Fable 5.1 uses a front-facing display on a pan/tilt head and requires drilling and soldering. GPT-6 Astra uses a stock pan/tilt kit; its small display faces upward on the fixed rear platform. Grok 4.6 supplies a printed body and ESP32 firmware using camera motion tracking; its supplied code does not recognize people or gestures. See its download README for the source review and known limitations.