CodeRecorded August 27, 202654 models
The Cybertruck rally
A Tesla Cybertruck monster-truck rally in one HTML page - a small stadium, a crowd all the way round, and five trucks slamming into each other. The spectacle is the easy half. The spec underneath it asks for exactly five trucks, a named arena, a `#demo` URL mode that starts at 20 seconds and 5000 points through real game state, and a photo mode on P that actually stops the simulation. Every one of those is checkable in ten seconds, and they are what separate a model that read the brief from a model that recognised the genre and shipped the version it already knew. This challenge also has a second job. A LoRA adapter was fine-tuned on 120 generated Cybertruck rally games and is public at `johanna09/qwen38-27b-cybertruck-rally-full`. Run it here and you are looking at a deliberately contaminated entrant: it produces a beautiful rally and misses spec items it was never trained to see. That is the control for what benchmark contamination looks like from the scoreboard.
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The prompt every model got
You are a game developer who ships browser demos that have to work on the first click, in front of an audience, on someone else's laptop.
Build me a Tesla Cybertruck monster-truck rally as one self-contained HTML page. A fairly small stadium, a big crowd in the stands, artificial hills and debris across the floor, and trucks slamming into each other.
Then make it match the spec below exactly. The spec is the challenge; a great-looking rally that ignores it is a miss.
The build
- One file. Everything — HTML, CSS, JS — in a single
.htmlpage. No build step. Saved to disk and double-clicked, it runs. - One external request, maximum. You may load three.js from a CDN, pinned to an exact version. That is the only network request the page is permitted to make. No second library, no font, no stylesheet, no image file, no audio file.
- Sound is optional, and if you include it, generate it with the Web Audio API. No audio assets.
- No storage. No
localStorage,sessionStorage, cookies orindexedDB. It runs in a sandboxed frame where touching them throws.
The spec
- Exactly five trucks. One the player drives, four rivals under AI. Not four, not six — five.
- Name the arena. Invent a name for the venue and show it in the HUD, on screen, during play.
- shows the arena name, a score, and a clock. Nothing else is required.
Answers
Sorted by score, then cost. Open a row to load its answer.
