> ## Documentation Index
> Fetch the complete documentation index at: https://noorle.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Result Reranking

> LLM-based result reranking for improved relevance.

Reranking uses an LLM to refine search results, improving accuracy.

## How Reranking Works

1. **Vector Search** - Retrieve top 20 results
2. **LLM Evaluation** - LLM scores each for relevance
3. **Reorder** - Results reordered by LLM score
4. **Return** - Top results more accurate

## When to Use Reranking

### Use Reranking

* Complex queries
* Need high accuracy
* Willing to pay for quality

### Skip Reranking

* Simple queries
* Speed critical
* Cost-conscious

## Enabling Reranking

1. **Knowledge** > Select KB
2. **Settings** > **Search Configuration**
3. Toggle **Enable Reranking**
4. Click **Save**

## Reranking Models

Available models:

| Model       | Quality |
| ----------- | ------- |
| gpt-4o-mini | Good    |
| gpt-4o      | Better  |
| gpt-5-nano  | Best    |

## Citation Tracking

With reranking, track which documents contributed:

```
Answer: "Our refund policy is..."
Source: Page 3, Customer Policy.pdf (89% confidence)
```

Agent can cite sources in response.

## Performance

Reranking adds latency:

* Vector search: 100-200ms
* Reranking: 500-1000ms
* Total: \~1 second

Trade-off: Accuracy vs speed

## Disabling Reranking

If not needed or too expensive:

1. **Settings** > **Search Configuration**
2. Toggle **Disable Reranking**
3. Back to vector search only

## Best Practices

### Use When:

* Quality matters more than speed
* Complex domain knowledge
* Legal/compliance content
* Customer-facing answers

### Skip When:

* Speed critical
* Simple lookups
* Internal use
* Budget constrained

## Evaluation

Improve reranking quality:

1. Test different models
2. Monitor citation accuracy
3. Adjust threshold if needed
4. A/B test with/without

## Next Steps

* [Vector Search](/docs/run/knowledge/vector-search)
* [Knowledge Overview](/docs/run/knowledge/overview)
* [Uploading Documents](/docs/run/knowledge/uploading-documents)