# Error Handling

### Common Error Types

| Error Type | Cause | Solution |
|------------|-------|----------|
| **AuthenticationError** | Invalid API key | Check API key validity |
| **RateLimitError** | Too many requests | Implement backoff, upgrade plan |
| **TimeoutError** | Request timeout | Increase timeout, check network |
| **ModelNotFound** | Invalid model name | Check provider model list |
| **ProviderNotFound** | Unknown provider | Register provider or check spelling |

### Retry Configuration

```typescript
const resilientAI = new AIModel({
  apiKey: 'your-key',
  provider: 'openai',
  retryAttempts: 5,           // 5 retry attempts
  timeout: 60000,             // 60 second timeout
  debug: true
});

// Automatic retry with exponential backoff:
// Attempt 1: Immediate
// Attempt 2: 2 second delay  
// Attempt 3: 4 second delay
// Attempt 4: 8 second delay
// Attempt 5: 16 second delay
```