> For the complete documentation index, see [llms.txt](https://burp-ai-agent.six2dez.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://burp-ai-agent.six2dez.com/backends/ollama.md).

# Ollama (Local)

Ollama is the recommended local backend when privacy constraints prevent cloud usage.

## Requirements

* Ollama installed.
* At least one model pulled locally.

## Setup

1. Install Ollama from [ollama.com](https://ollama.com).
2. Pull a model:

```bash
ollama pull qwen2.5:14b-instruct
```

3. Start server:

```bash
ollama serve
```

4. Configure in **AI Backend** settings tab.

## Configuration

| Setting               | Value                       |
| --------------------- | --------------------------- |
| **Preferred Backend** | `Ollama`                    |
| **Ollama URL**        | `http://127.0.0.1:11434`    |
| **Ollama Model**      | e.g. `qwen2.5:14b-instruct` |
| **Ollama API Key**    | optional                    |
| **Ollama Headers**    | optional                    |
| **Ollama Auto-Start** | optional (`ollama serve`)   |

## Notes

The active backend path is HTTP-based. CLI command fields are primarily used for validation/default-model detection.

## Output Token Limits

The extension now sets `num_predict` automatically per request type. Previously, Ollama defaulted to 128 tokens, which caused truncated responses. Current values:

| Request Type                 | `num_predict` |
| ---------------------------- | ------------- |
| **Chat**                     | 4096          |
| **Scanner (single request)** | 2048          |
| **Scanner (batch analysis)** | 4096          |
| **Payload generation**       | 1024          |

## Troubleshooting

{% hint style="info" %}

* Empty responses: run `ollama list` and verify model exists.
* Connection issues: confirm server process and URL.
* Slow output: reduce model size on limited hardware.
  {% endhint %}

## Retry Behavior

If a request to Ollama fails due to a transient network error (connection timeout, connection refused), the extension retries automatically up to 6 attempts using a bounded stepped backoff schedule (500/1000/1500/2000/3000/4000 ms). Each retry is logged in the [AI Request Logger](/privacy-and-logging/ai-request-logger.md) with the attempt number and delay. After 5 consecutive failures a circuit breaker opens for 30 seconds before allowing a half-open probe — see [Backends Overview → Retry Behavior](/backends/overview.md#retry-behavior).

## Related Pages

* [Backends Overview](/backends/overview.md)
* [Troubleshooting](/reference/troubleshooting.md)


---

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