[One Shot Challenge](/) # One prompt.One shot. Boil down your creativity and vision into your best shot. [Submit your prompt](/submit) [How it works](/#how) Round 01 Jul 13 – Jul 18, 2026 · winners Jul 19 days.winners.GTA VI copies.(+1 PS5 for First Place) One prompt in, something spectacula

One prompt.One shot.

Boil down your creativity and vision into your best shot.

Submit your prompt

How it works

Round 01

Jul 13 – Jul 18, 2026 · winners Jul 19

days.winners.GTA VI copies.(+1 PS5 for First Place)

One prompt in, something spectacular out. Build a whole game, a living world, a toy that feels impossible. The more complex, rich and deep, the better.

A year ago this was impossible.The newest models, like Fable 5Fable 5, Opus 4.8, GPT-4.6 Sol, Gemini 3.1 Pro, Grok 4.5, GLM 5.2, DeepSeek V4, Seed 2.1 Pro, Qwen3.7 Max, Kimi K2.6, Muse Spark 1.1build entire apps, games and worlds from a single prompt. No scaffolding. No back and forth. You describe it once, and a working thing comes out.

The One Shot Challenge puts that to the test: how far can you and your model get in a single shot?

01The prizes

SIGGRAPH

02How it works

01Write one promptOne prompt, as long as you want. It is your whole entry.

Write one prompt

One prompt, as long as you want. It is your whole entry.

02Bring your best modelAny provider, your own key. No key? Muse Spark ($20 free) and Gemini give you a frontier model; Groq and NVIDIA hand out free keys too.

Bring your best model

Any provider, your own key. No key? Muse Spark ($20 free) and Gemini give you a frontier model; Groq and NVIDIA hand out free keys too.

03Confirm your emailClick the link we send. Nothing runs until you do.

Confirm your email

Click the link we send. Nothing runs until you do.

04It runs onceOne model call. No edits, no retries. Broken still counts.

It runs once

One model call. No edits, no retries. Broken still counts.

05It ships, sealedInto the gallery, prompt and model hidden until results.

It ships, sealed

Into the gallery, prompt and model hidden until results.

066 winnersFive picked by a jury (Lionsgate AI, Sony, the NBA, World Labs), one by your community vote.

6 winners

Five picked by a jury (Lionsgate AI, Sony, the NBA, World Labs), one by your community vote.

03Under the hood

No black box. We run your prompt on our own server for one reason: so every entry is a provable single prompt and single model call, with no edits or retries. Your API key is encrypted, used for exactly one call, then destroyed, never stored with your entry. The result is published in a locked-down sandbox with a hash anyone can verify. Every entry is untrusted code, so it runs walled off and isolated: it can't reach our servers, your data, or any other entry.

See the full architecture and security →

04The rules

Runs July 13–18. One entry per day, per email: 6 shots total.

Prompts and models stay sealed until the results.

A jury of AI leaders from Lionsgate AI, Sony, the NBA and World Labs picks 5 of the 6 winners at the Worlds in Action Hack at SIGGRAPH LA on July 19. The 6th is the community favorite, decided by your votes.

Anything goes. 3D worlds, games, toys, sandboxes and experiments are encouraged.

Your entry must be the self-contained output of your one prompt. Libraries (three.js and the like) from the approved CDNs are fine, but loading your own external or mutable code bundle, so you can keep editing it after submission, is grounds for disqualification.

Use only assets, code and fonts you are licensed to use. Free and open sources, like the CC0 textures and models on Poly Haven, are perfect. Here’s how to load assets from the CDNs.

how to load assets from the CDNs

The challenge, live