⚔️ isbetter.ai

Compare AI models. Side by side.

Give every model the same prompt and compare the answer, the generated code, a live preview, speed, tokens and cost — all streaming in real time, right in your browser.

Live at isbetter.ai

Features

• Side-by-side battles — run one prompt against up to 6 models at once and watch every answer stream in.
• Three views per result — the raw output, the extracted code, and a sandboxed live preview of what the model built.
• Blind mode — hide and shuffle model identities so you judge the output, not the logo. Reveal whenever you’re ready.
• Battle metrics — total time, time to first token, generation speed, tokens and estimated cost, with a timeline chart and per-metric winners.
• Shareable battles — publish a battle and send a link so anyone can review the results.
• Local history — every battle is saved in your browser so you can revisit or re-run it later.
• Bring your own keys — API keys are stored in localStorage and sent only to their provider. They never touch our servers.

Supported providers

Provider	Notes
OpenRouter	Hundreds of models from every major lab through one key
OpenAI	GPT models
Anthropic	Claude models
Google Gemini	Gemini models
xAI	Grok models
DeepSeek	DeepSeek chat and reasoner models
Mistral AI	Mistral models
Groq	Ultra-fast open-model inference
Cerebras	Ultra-fast open-model inference
Local	Any OpenAI-compatible server (Ollama, LM Studio, llama.cpp, …)

Models served through an inference provider (OpenRouter, Groq, Cerebras, local) also show the badge of the lab that created the model.

Tech stack

• Astro with server routes on Cloudflare Workers
• Tailwind CSS 4 for styling
• Cloudflare D1 for shared battles
• Vitest for unit tests
• Streaming responses over SSE with a per-provider registry (src/scripts/providers/)

Getting started

Requirements: Node.js ≥ 22.12 and pnpm.

git clone https://github.com/midudev/ai-battle.git
cd ai-battle
pnpm install
pnpm dev

Open http://localhost:4321, press K to add at least one provider API key, pick your contenders and run a battle.

Commands

Command	Action
pnpm dev	Start the local dev server at localhost:4321
pnpm build	Build the production site to ./dist/
pnpm preview	Preview the production build locally
pnpm test	Run the unit test suite (Vitest)
pnpm check	Type-check the project (astro check)

Shared battles (Cloudflare D1)

Shared battle links are stored in a D1 database bound as BATTLES_DB (see wrangler.jsonc). To set up your own:

npx wrangler d1 create ai-battle-results
npx wrangler d1 migrations apply ai-battle-results

The API surface is small: POST /api/battles stores a battle and returns its id, GET /api/battles/:id fetches it for the /battle review page.

Project structure

/
├── migrations/            # D1 schema migrations
├── public/                # Static assets (favicon, fonts)
├── src/
│   ├── components/        # Astro components (header, footer, toolbar, icons)
│   ├── layouts/           # Base HTML layout and meta tags
│   ├── pages/
│   │   ├── index.astro    # The arena
│   │   ├── battle/        # Shared battle review page
│   │   └── api/battles/   # Shared battles API (Cloudflare D1)
│   ├── scripts/
│   │   ├── app.ts         # Arena logic
│   │   ├── battle.ts      # Battle review logic
│   │   ├── lib.ts         # Shared rendering and metric helpers
│   │   ├── model-icons.ts # Model brand icon registry
│   │   └── providers/     # Provider registry + SSE streaming
│   └── styles/            # Global styles (Tailwind 4)
└── wrangler.jsonc         # Cloudflare Workers + D1 config

Privacy

Everything sensitive stays client-side: API keys, prompts and battle history live in your browser’s localStorage. The only data that ever reaches the server is a battle you explicitly choose to share.

Contributing

Issues and pull requests are welcome! Please use the issue templates to report bugs or request features, and keep commits following the Conventional Commits style.

License

FSL-1.1-MIT (Functional Source License). You can use, copy, modify and redistribute the code for any purpose except building a competing product. Each release automatically becomes MIT two years after publication.

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