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

# Perplexity Decision Model

> Add a Perplexity API key to run Decision Judge evaluations on the pplx-decider-v1.1-27b decision model in Arize AX

Add your Perplexity API key so Arize AX can call `pplx-decider-v1.1-27b` when you run [Decision Judge](/docs/ax/evaluate/decision-judge.md) evaluators.

Perplexity is a **restricted-use, eval-only** provider: it powers Decision Judge evaluators and does not appear in the prompt playground or Alyx model pickers. It appears in the `/v2/ai-integrations` REST API only when a request filters by provider. The integration has no base URL setting. Arize always sends requests to the Perplexity Decisions endpoint.

> [!NOTE]
>
> By adding this integration, your data may be sent to Perplexity when your Decision Judge evaluators run, and your Perplexity account will be billed for usage.

## Add the Integration from Arize AX

**Navigate to Settings → AI Providers**, then select **Perplexity**.

![The Perplexity integration form with fields for Integration Name and API Key, and the terms checkbox](https://storage.googleapis.com/arize-phoenix-assets/assets/images/arize-docs-images/ai-integration-providers-perplexity-details.webp)

The Perplexity integration form

1. Give the integration a **name** and paste your Perplexity **API key**.
2. Accept the terms checkbox.
3. Optionally click **Test Integration**.
4. Save the integration.

Creating an AI provider requires account admin or organization admin access. If role-based access control is enabled for your account, you need the LLM integration create permission at the scope you select. After saving, create a [Decision Judge](/docs/ax/evaluate/decision-judge.md) evaluator and select this integration.