# AI Configuration Guide

## Admin Settings

Navigate to **Settings → AI** to configure AI features.

### Available Settings

| Setting | Description | Default |
|---------|-------------|---------|
| `ai_enabled` | Master switch for AI features | `true` |
| `ai_provider` | AI provider (OpenAI only currently) | `openai` |
| `ai_model` | Model to use | `gpt-4o` |
| `openai_api_key` | API key (encrypted) | - |
| `ai_send_descriptions` | Include project descriptions | `true` |

## Supported Models

### Standard Models (GPT)

| Model | Speed | Quality | Cost | Recommended For |
|-------|-------|---------|------|-----------------|
| `gpt-4o` | Fast | Best | Medium | Production use |
| `gpt-4o-mini` | Very Fast | Good | Low | High-volume, cost-sensitive |
| `gpt-4-turbo` | Medium | Very Good | High | Complex analysis |
| `gpt-3.5-turbo` | Very Fast | Basic | Very Low | Simple tasks only |

### Reasoning Models (o-series)

| Model | Speed | Quality | Cost | Recommended For |
|-------|-------|---------|------|-----------------|
| `o1` | Slow | Excellent | Very High | Complex reasoning tasks |
| `o1-mini` | Medium | Very Good | High | Moderate complexity |
| `o3-mini` | Medium | Good | Medium | Cost-effective reasoning |

**Note:** Reasoning models use different API parameters:
- `max_completion_tokens` instead of `max_tokens`
- No `temperature` parameter
- No `response_format: json_object`
- System messages become "developer" role

The platform automatically handles these differences via `buildCompletionParams()`.

## Cost Estimates

### Per 1M Tokens (USD)

| Model | Input | Output |
|-------|-------|--------|
| gpt-4o | $2.50 | $10.00 |
| gpt-4o-mini | $0.15 | $0.60 |
| gpt-4-turbo | $10.00 | $30.00 |
| gpt-3.5-turbo | $0.50 | $1.50 |
| o1 | $15.00 | $60.00 |
| o1-mini | $3.00 | $12.00 |
| o3-mini | $1.10 | $4.40 |

### Typical Usage Per Operation

| Operation | Projects | Est. Tokens | Est. Cost (gpt-4o) |
|-----------|----------|-------------|-------------------|
| Filter 100 projects | 100 | ~10,000 | ~$0.10 |
| Assign 50 projects | 50 | ~15,000 | ~$0.15 |
| Award eligibility | 100 | ~10,000 | ~$0.10 |
| Mentor matching | 60 | ~12,000 | ~$0.12 |

## Rate Limits

OpenAI enforces rate limits based on your account tier:

| Tier | Requests/Min | Tokens/Min |
|------|--------------|------------|
| Tier 1 | 500 | 30,000 |
| Tier 2 | 5,000 | 450,000 |
| Tier 3+ | Higher | Higher |

The platform handles rate limits with:
- Batch processing (reduces request count)
- Error classification (detects rate limit errors)
- Manual retry guidance in UI

## Environment Variables

```env
# Required for AI features
OPENAI_API_KEY=sk-your-api-key

# Optional overrides (normally set via admin UI)
OPENAI_MODEL=gpt-4o
```

## Testing Connection

1. Go to **Settings → AI**
2. Enter your OpenAI API key
3. Click **Save AI Settings**
4. Click **Test Connection**

The test verifies:
- API key validity
- Model availability
- Basic request/response

## Monitoring Usage

### Admin Dashboard

Navigate to **Settings → AI** to see:
- Current month cost
- Token usage by feature
- Usage by model
- 30-day usage trend

### Database Queries

```sql
-- Current month usage
SELECT
  action,
  SUM(total_tokens) as tokens,
  SUM(estimated_cost_usd) as cost
FROM ai_usage_log
WHERE created_at >= date_trunc('month', NOW())
GROUP BY action;

-- Top users by cost
SELECT
  u.email,
  SUM(l.estimated_cost_usd) as total_cost
FROM ai_usage_log l
JOIN users u ON l.user_id = u.id
GROUP BY u.id
ORDER BY total_cost DESC
LIMIT 10;
```

## Troubleshooting

### "Model not found"

- Verify the model is available with your API key tier
- Some models (o1, o3) require specific API access
- Try a more common model like `gpt-4o-mini`

### "Rate limit exceeded"

- Wait a few minutes before retrying
- Consider using a smaller batch size
- Upgrade your OpenAI account tier

### "All projects flagged"

1. Check **Settings → AI** for correct API key
2. Verify model is available
3. Check console logs for specific error messages
4. Test connection with the button in settings

### "Invalid API key"

1. Verify the key starts with `sk-`
2. Check the key hasn't been revoked in OpenAI dashboard
3. Ensure no extra whitespace in the key

## Best Practices

1. **Use gpt-4o-mini** for high-volume operations (filtering many projects)
2. **Use gpt-4o** for critical decisions (final assignments)
3. **Monitor costs** regularly via the usage dashboard
4. **Test with small batches** before running on full dataset
5. **Keep descriptions enabled** for better matching accuracy

## See Also

- [AI System Architecture](./ai-system.md)
- [AI Services Reference](./ai-services.md)
- [AI Error Handling](./ai-errors.md)