Model Capability Arena

A production-ready benchmarking workspace for comparing LLM capability outputs under standardized task constraints.

模型代码放哪里（最关键）

每个模型生成的结果都放到这个路径：

public/submissions/<theme>/<model>/<submission-file>

例如：

public/submissions/clock/gemini-3.1-pro-high/index.html
public/submissions/clock/gpt-5.3-codex/index.html
public/submissions/carwash-decision/gemini-3.1-pro-high/response.md

放好后会自动被页面读取并渲染（无需改前端代码）：

• 本地开发：刷新 http://localhost:3000 即可看到
• Cloudflare 线上：提交并重新部署后可见

硬性要求（按主题类型）：

• 视觉主题（clock / recorder / weather-card / stock-panel / click-fireworks / neon-countdown / particle-gravity / cheetah-trophy-run / dslr-camera / schwarzschild-black-hole）文件名必须是 index.html
• 问答主题（carwash-decision）文件名推荐 response.md（也支持 answer.md / response.txt / answer.txt）
• 目录名必须是已支持主题之一（clock / recorder / weather-card / stock-panel / click-fireworks / neon-countdown / particle-gravity / cheetah-trophy-run / dslr-camera / schwarzschild-black-hole / carwash-decision）
• 一个模型一个目录（目录名就是模型名）
• 反作弊：严禁查看 public/submissions/<theme>/ 下其他模型目录；只能写入当前目标模型目录

What This Project Solves

When comparing model outputs, most evaluations are noisy because prompts, runtime, and rendering conditions vary. This project enforces a consistent benchmark surface so you can compare models fairly:

• Same task definitions
• Same output contract
• Same runtime container
• Side-by-side visual comparison in one page

Core Features

• Unified benchmark dashboard (single-page comparison)
• Theme switching (Clock, Recorder, Weather Card, Stock Panel, Click Fireworks, Neon Countdown, Particle Gravity, Cheetah Trophy Run, DSLR Camera, Schwarzschild Black Hole, Carwash Decision)
• Model filtering (multi-select)
• Automatic submission discovery from filesystem
• Constraint inspection per submission:
  • total lines
  • CSS lines
  • JS lines
  • line-limit pass/fail
• Reusable prompt templates with hard constraints
• One-command prompt generator
• OpenNext + Cloudflare Workers deployment

Tech Stack

• Next.js (App Router)
• React + TypeScript
• Filesystem-based submission ingestion (public/submissions/**)
• OpenNext for Cloudflare Workers

Project Structure

model-ui-arena/
  app/
    api/submissions/route.ts      # API endpoint: scan + aggregate submissions
    globals.css
    layout.tsx
    page.tsx
  components/
    arena-dashboard.tsx           # comparison UI
  lib/
    submissions.ts                # scanner + metrics + theme metadata
  tasks/
    task-definitions.json         # single source of task metadata and rules
    profiles/                     # shared prompt constraint profiles
    <task-id>/prompt.md           # task-specific prompt
  public/
    submissions/
      <theme>/<model>/<submission-file> # model outputs (html or text)
  scripts/
    build-prompt.mjs              # prompt composer CLI

Quick Start

npm install
npm run dev

Open http://localhost:3000.

Submission Contract

Every model output must be stored as:

public/submissions/<theme>/<model>/<submission-file>

Example:

public/submissions/
  clock/
    gpt-5.3-codex/index.html
    gemini-3.1-pro-high/index.html
  carwash-decision/
    gpt-5.3-codex/response.md
    gemini-3.1-pro-high/response.md

The dashboard auto-loads and renders all discovered submissions.

Anti-cheating policy:

• Never read or inspect other model directories under public/submissions/<theme>/.
• Only write to the current target model directory.

Benchmark Themes

• clock
• recorder
• weather-card
• stock-panel
• click-fireworks
• neon-countdown
• particle-gravity
• cheetah-trophy-run
• dslr-camera
• schwarzschild-black-hole
• carwash-decision

Prompt Workflow

1) Generate a complete benchmark prompt

npm run prompt -- --theme clock --model gpt-5.3-codex --max-lines 180 --language "HTML + CSS + JavaScript"

2) Send prompt to target model

Use the generated prompt text directly in your target model.

3) Save model output

Save the returned file into the matching submission path:

• visual themes: index.html
• carwash decision: response.md (recommended)

4) Refresh dashboard

The benchmark page updates from filesystem scans.

Standard Constraint Profile (Recommended)

• Runtime: visual themes use HTML + CSS + JavaScript; carwash-decision is text reasoning
• File count: exactly 1 per model per theme
• Max lines: 180-220 for standard visual themes; cheetah-trophy-run, dslr-camera and schwarzschild-black-hole have no code line limit
• External dependencies: forbidden
• Mobile baseline: width 390px

API

GET /api/submissions

Returns:

• benchmark metadata (themes, constraints)
• normalized submission list
• per-submission metrics and pass/fail state

Deploy to Cloudflare Workers

1. Run npx wrangler login once and confirm with npx wrangler whoami
2. Push repository changes to GitHub
3. Run npm run deploy
4. Verify model-ui-arena.lank.workers.dev

The deploy script builds the submissions manifest, creates the OpenNext bundle, uploads static assets, and deploys the Worker.

Troubleshooting

Hydration warning in browser console

If you see hydration mismatch with injected attributes (e.g. theme/class attributes), this is usually caused by browser extensions mutating DOM before React hydration.

• Try Incognito mode (without extensions)
• Hard refresh (Cmd + Shift + R)

The layout already includes hydration-warning suppression on root nodes to reduce noisy extension-induced warnings.

Cannot find module './xxx.js' in .next/server/...

If this appears during development, it is usually a build-cache collision (for example, running next dev and next build against the same .next directory).

• This project isolates dev artifacts to .next-dev (npm run dev)
• Production build artifacts remain in .next (npm run build / npm run start)
• If needed, clean both and restart:
  • rm -rf .next .next-dev
  • npm run dev

Scripts

npm run dev
npm run build
npm run start
npm run prompt -- --theme <theme> --model <name> --max-lines <n>
npm run deploy

License

This project is licensed under the MIT License. See LICENSE for details.