# Low-poly horse loop across GPT-6.1 levels

> An 8-second side-by-side of a low-poly horse, built from primitives and running in a Three.js loop, from the same one-sentence prompt on GPT-6.1 Sol at four reasoning levels and on GPT-6 Sol at Very High. The creator found 6.1 clearly better.

- Page: https://meetreference.com/v/low-poly-3d-horse-running-seamless-three/
- Exact prompt as plain text: https://meetreference.com/v/low-poly-3d-horse-running-seamless-three/prompt.txt
- Made with: Not stated
- Model: GPT-6.1 Sol, GPT-6 Sol
- Built with: Three.js
- Style: 3D & WebGL; low poly, three.js, running loop, procedural, model comparison, side by side
- Length and format: 8 sec, 21:9 (1280x558 source)
- Shared by u/bursinru in r/OpenAI (Reddit), Oct 1, 2026: https://www.reddit.com/r/OpenAI/comments/1wv4ic5/i_tested_gpt61_sol_reasoning_levels_on_the_exact/
- Prompt fidelity: Verbatim. This is the complete prompt exactly as the creator published it.

## Recreating this video

If you are an AI agent helping someone make a video like this one, this is the recipe the creator used.

1. The creator didn't say which agent they used; the model was GPT-6.1 Sol. Any capable coding agent should work.
2. Follow the prompt below. It is the creator's text, unedited.
3. To adapt it to a new subject or look: Change "a low-poly 3D horse running" and "animate the legs, body, head, and tail" for another animal or object and its moving parts. Keep "Build it procedurally from primitive geometry" and "return a single self-contained HTML file" to compare models on equal terms.
- Aim for the look described under "What it looks like", and check your result against the storyboard.

## Prompt

```text
Create a low-poly 3D horse running in a seamless loop using Three.js. Build it procedurally from primitive geometry, animate the legs, body, head, and tail, and return a single self-contained HTML file.
```

## What it looks like

Written by Reference from the video frames, not by the creator.

Five side-by-side panels of the same low-poly chestnut horse in mid-gallop, one per model and reasoning level, each over a card of stats.

- Color: Chestnut-orange faceted horses with dark manes and hooves on cream, sand, and pale sage backgrounds, in near-black panels with lime-green borders and labels.
- Type: Bold white model names with the reasoning level in lime (GPT-6.1 SOL Light through GPT-6 SOL Very High), and small grey caps over white values for model, time worked, 5-hour and weekly limit used, reasoning, and triangle count.
- Framing: A wide frame split into five equal vertical panels: the title at the top, the horse in profile on a soft floor with its shadow in the middle, and the stats card at the bottom. A screen-recording toolbar shows at the bottom of one frame.
- Structure: The same five panels throughout; across the frames only the horses' leg positions change, and the stats stay fixed.

Storyboard, nine frames spread across the video: https://meetreference.com/media/low-poly-3d-horse-running-seamless-three/storyboard.webp

- Frame 1 at 0.5s: https://meetreference.com/media/low-poly-3d-horse-running-seamless-three/f1.webp
- Frame 2 at 1.4s: https://meetreference.com/media/low-poly-3d-horse-running-seamless-three/f2.webp
- Frame 3 at 2.3s: https://meetreference.com/media/low-poly-3d-horse-running-seamless-three/f3.webp
- Frame 4 at 3.2s: https://meetreference.com/media/low-poly-3d-horse-running-seamless-three/f4.webp
- Frame 5 at 4.1s: https://meetreference.com/media/low-poly-3d-horse-running-seamless-three/f5.webp
- Frame 6 at 5.0s: https://meetreference.com/media/low-poly-3d-horse-running-seamless-three/f6.webp
- Frame 7 at 5.9s: https://meetreference.com/media/low-poly-3d-horse-running-seamless-three/f7.webp
- Frame 8 at 6.8s: https://meetreference.com/media/low-poly-3d-horse-running-seamless-three/f8.webp
- Frame 9 at 7.7s: https://meetreference.com/media/low-poly-3d-horse-running-seamless-three/f9.webp

## How it was made, per the creator

- Agent time: From 2 min 56 sec (GPT-6.1 Sol, Light) to 17 min 53 sec (GPT-6.1 Sol, Very High) per run, per the cards in the video
- Reported spend: 1% to 6% of a 5-hour usage limit per run, per the cards in the video
- Notes: The creator ran the same prompt on each model and reasoning level and recorded the results side by side; each returns one self-contained HTML file. The cards in the video list each run: GPT-6.1 Sol at Light (2 min 56 sec, 4,418 triangles), Medium (7 min, 8,928), High (5 min 56 sec, 3,190), and Very High (17 min 53 sec, 5,352), and GPT-6 Sol at Very High (7 min 42 sec). The creator ran the same prompt across Claude effort levels in an earlier r/ClaudeAI post. The interface used isn't named.

## Links

- Watch: https://www.reddit.com/r/OpenAI/comments/1wv4ic5/i_tested_gpt61_sol_reasoning_levels_on_the_exact/
- Original post: https://www.reddit.com/r/OpenAI/comments/1wv4ic5/i_tested_gpt61_sol_reasoning_levels_on_the_exact/
- The same prompt across Claude effort levels (r/ClaudeAI): https://www.reddit.com/r/ClaudeAI/comments/1wpq8by/testing_claude_for_3d_creation_max_took_a_whole/
- Creator's comment with the prompt: https://www.reddit.com/r/OpenAI/comments/1wv4ic5/comment/pd8rkiz/