# OpenRouter Model Picker

A React component that gives you an **in-app model selector** for the [OpenRouter API](https://openrouter.ai/docs/api-reference/list-available-models). Browse, filter, and select from 325+ AI models with real-time cost comparison and spec viewing - no more alt-tabbing during development.

*This is an unofficial tool created by a user of OpenRouter's service - not affiliated with or endorsed by OpenRouter.*


[![npm version](https://badge.fury.io/js/openrouter-model-picker.svg)](https://badge.fury.io/js/openrouter-model-picker)
[![npm downloads](https://img.shields.io/npm/dm/openrouter-model-picker.svg)](https://www.npmjs.com/package/openrouter-model-picker)

![OpenRouter Model Picker Demo](./assets/demo-screenshot.png)

## 🎯 Why This Exists

**LLM model selection is a moving target.** When building AI-powered applications, choosing the right model involves constant trade-offs between cost, quality, speed, and capabilities. This is what I call finding **Product-Model Fit** - the model that best serves your product at each stage of development.

> 📖 **Read more:** [Product Model Fit with OpenRouter Model Picker](https://dannyshmueli.com/2025/06/21/Product-Model-Fit-with-OpenRouter-Model-Picker/) - A deeper dive into the concept and development story behind this component.

As a developer, I found myself constantly alt-tabbing between the OpenRouter website and my code to explore available models, compare pricing, and check capabilities. This became especially tedious when:

- **Building prototypes** where I needed to quickly test different models
- **Optimizing costs** by comparing pricing across providers and model tiers  
- **Matching capabilities** to specific use cases (vision, context length, etc.)
- **Avoiding analysis paralysis** with 325+ model options

Rather than hardcoding a few model options or losing momentum switching between tabs, this component brings the entire OpenRouter model catalog directly into your application. Make informed decisions about model selection based on real-time pricing, capabilities, and performance characteristics - all within your app's interface.

**Perfect for:**
- Finding **Product-Model Fit** during development and iteration
- Developer tools and AI playgrounds  
- Cost optimization dashboards
- Multi-model AI applications
- Educational tools teaching about different LLMs

## ✨ Features

- 🔍 **Smart Filtering**: Real-time search across model names, providers, descriptions, and features
- 💰 **Cost Awareness**: Color-coded pricing tiers and detailed cost breakdowns
- 📊 **Performance Metrics**: Context window and capability information
- ♿ **Accessibility**: Full keyboard navigation, screen reader support, ARIA compliance
- 📱 **Responsive**: Optimized for desktop, tablet, and mobile devices
- 🎨 **Customizable**: Light/dark themes, custom sizing, and CSS classes
- ⚡ **Performance**: Debounced search, memoized operations, efficient rendering
- 🔒 **Type Safe**: Full TypeScript support with comprehensive type definitions

## 🚀 Installation

```bash
npm install openrouter-model-picker
# or
yarn add openrouter-model-picker
# or
pnpm add openrouter-model-picker
```

### Installing from GitHub (Development)

```bash
npm install github:dannyshmueli/openrouter-model-picker
```

## 📦 Basic Usage

```tsx
import React, { useState } from 'react'
import { ModelChooserModal } from 'openrouter-model-picker'
import 'openrouter-model-picker/styles'

function App() {
  const [selectedModel, setSelectedModel] = useState('openai/gpt-4o-mini')
  const [isModalOpen, setIsModalOpen] = useState(false)

  return (
    <>
      <button onClick={() => setIsModalOpen(true)}>
        Choose Model: {selectedModel}
      </button>

      <ModelChooserModal
        isOpen={isModalOpen}
        onClose={() => setIsModalOpen(false)}
        selectedModel={selectedModel}
        onModelChange={setSelectedModel}
      />
    </>
  )
}
```

## 🔧 Advanced Usage

### Using the Selected Model

```tsx
import React, { useState } from 'react'
import { ModelChooserModal } from 'openrouter-model-picker'
import 'openrouter-model-picker/styles'

function AdvancedApp() {
  const [selectedModel, setSelectedModel] = useState('openai/gpt-4o-mini')
  const [isModalOpen, setIsModalOpen] = useState(false)

  const handleApiCall = async () => {
    if (!selectedModel) return
    
    try {
      const response = await fetch('https://openrouter.ai/api/v1/chat/completions', {
        method: 'POST',
        headers: {
          'Authorization': `Bearer ${process.env.OPENROUTER_API_KEY}`,
          'Content-Type': 'application/json'
        },
        body: JSON.stringify({
          model: selectedModel, // Use the selected model ID
          messages: [
            { role: 'user', content: 'Hello, how are you?' }
          ]
        })
      })
      
      const data = await response.json()
      console.log('Response:', data)
    } catch (error) {
      console.error('API Error:', error)
    }
  }

  return (
    <div>
      <button onClick={() => setIsModalOpen(true)}>
        Choose Model
      </button>
      
      {selectedModel && (
        <div>
          <p>Selected: {selectedModel}</p>
          <button onClick={handleApiCall}>
            Make API Call
          </button>
        </div>
      )}

      <ModelChooserModal
        isOpen={isModalOpen}
        onClose={() => setIsModalOpen(false)}
        selectedModel={selectedModel}
        onModelChange={setSelectedModel}
        maxHeight="90vh"          // Custom height
        maxWidth="1200px"         // Custom width
        className="my-modal"      // Custom CSS class
      />
    </div>
  )
}
```

### With Custom Fallback Data

```tsx
import { ModelChooserModal, ModelInfo } from 'openrouter-model-picker'
import 'openrouter-model-picker/styles'

const fallbackModels: ModelInfo[] = [
  {
    id: 'openai/gpt-4o-mini',
    name: 'GPT-4o Mini',
    provider: 'OpenAI',
    costTier: 'low',
    description: 'Fast and affordable multimodal model',
    features: ['Vision', 'Fast'],
    pricing: { input: 0.00015, output: 0.0006, currency: 'USD' },
    context: 128000,
    multimodal: true
  }
]

function AppWithFallback() {
  return (
    <ModelChooserModal
      // ... other props
      fallbackModels={fallbackModels}
    />
  )
}
```

## 📋 API Reference

### ModelChooserModalProps

| Prop | Type | Default | Description |
|------|------|---------|-------------|
| `isOpen` | `boolean` | - | Controls modal visibility |
| `onClose` | `() => void` | - | Called when modal is closed |
| `selectedModel` | `string` | - | Currently selected model ID |
| `onModelChange` | `(modelId: string) => void` | - | Called when model selection changes |
| `fallbackModels` | `ModelInfo[]` | - | Fallback model data |
| `maxHeight` | `string` | `'80vh'` | Maximum modal height |
| `maxWidth` | `string` | - | Maximum modal width |
| `className` | `string` | - | Custom CSS class |

### ModelInfo Interface

```typescript
interface ModelInfo {
  id: string                    // Model ID (e.g., "openai/gpt-4o")
  name: string                  // Display name
  provider: string              // Provider name
  costTier: 'free' | 'low' | 'medium' | 'high'
  description: string           // Model description
  features?: string[]           // Capability tags
  pricing?: {
    input: number              // Input token price
    output: number             // Output token price
    currency: string           // Currency code
  }
  context?: number             // Context window size
  multimodal?: boolean         // Supports images/files
}
```

## 🎨 Theming and Customization

### CSS Custom Properties

```css
.openrouter-modal {
  --or-primary-color: #3b82f6;
  --or-primary-hover: #2563eb;
  --or-background: #ffffff;
  --or-text: #111827;
  --or-text-secondary: #6b7280;
  --or-border: #e5e7eb;
}

/* Dark theme */
.openrouter-modal.dark {
  --or-background: #1f2937;
  --or-text: #f9fafb;
  --or-text-secondary: #9ca3af;
  --or-border: #374151;
}
```

### Cost Tier Colors

- **Free**: `#10b981` (green)
- **Low**: `#3b82f6` (blue)
- **Medium**: `#f59e0b` (amber)
- **High**: `#ef4444` (red)

## 🔌 Hooks and Utilities

### useModelData Hook

```tsx
import { useModelData } from 'openrouter-model-picker'

function CustomComponent() {
  const { models, loading, error, refresh } = useModelData()
  
  // Use models data directly
  return (
    <div>
      {models.map(model => (
        <div key={model.id}>{model.name}</div>
      ))}
    </div>
  )
}
```

### useFiltering Hook

```tsx
import { useFiltering } from 'openrouter-model-picker'

function FilteredList({ models }) {
  const {
    filteredModels,
    filterState,
    updateFilter,
    clearFilters
  } = useFiltering(models)

  return (
    <div>
      <input
        type="text"
        onChange={(e) => updateFilter('searchTerm', e.target.value)}
        placeholder="Search models..."
      />
      {/* Render filtered models */}
    </div>
  )
}
```

## ♿ Accessibility

The component is built with accessibility in mind:

- **Keyboard Navigation**: Full support for keyboard-only users
- **Screen Readers**: ARIA labels and semantic HTML structure
- **Focus Management**: Proper focus trapping within the modal
- **High Contrast**: Support for high contrast mode
- **Reduced Motion**: Respects `prefers-reduced-motion` setting

## 📱 Responsive Design

### Breakpoints

- **Mobile**: `< 768px` - Simplified layout, touch-optimized
- **Tablet**: `768px - 1024px` - Condensed columns
- **Desktop**: `> 1024px` - Full table layout

### Mobile Adaptations

- Card-based layout instead of table
- Touch-friendly filter controls
- Optimized modal sizing

## 🔒 Error Handling

The component gracefully handles various error scenarios:

- **API Unavailable**: Falls back to cached or provided fallback data
- **Network Errors**: Shows retry option with error details
- **Rate Limiting**: Displays appropriate messages with retry timers
- **Empty Results**: Clear messaging with filter reset options

## 📊 Performance

### Optimization Features

- **Debounced Search**: 300ms delay to reduce excessive filtering
- **Memoized Operations**: Optimized filtering and sorting
- **Efficient Rendering**: Optimized React components
- **Small Bundle Size**: 44.3 kB package size

## 🛠️ Development

### Setup

```bash
git clone https://github.com/dannyshmueli/openrouter-model-picker
cd openrouter-model-picker
npm install
```

### Development Server

```bash
npm run dev
```

### Build

```bash
npm run build
```

### Type Check

```bash
npm run type-check
```

## 📄 License

MIT License - see [LICENSE](LICENSE) file for details.

## 🤝 Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

## 📞 Support

- 📖 [GitHub Repository](https://github.com/dannyshmueli/openrouter-model-picker)
- 🐛 [Issue Tracker](https://github.com/dannyshmueli/openrouter-model-picker/issues)
- 📦 [npm Package](https://www.npmjs.com/package/openrouter-model-picker)

## 🙏 Acknowledgments

- [OpenRouter](https://openrouter.ai) for the AI model API
- [Lucide React](https://lucide.dev) for the icon set
- The React community for best practices and patterns

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