# Perplexity (/docs/configuration/librechat_yaml/ai_endpoints/perplexity)

> Perplexity API key: [perplexity.ai/settings/api](https://www.perplexity.ai/settings/api)

**Notes:**

- **Known:** icon provided.
- **Known issue:** fetching list of models is not supported.
- API may be strict for some models, and may not allow fields like `stop` and `frequency_penalty` may cause an error when set to 0, in which case, you should use [`dropParams`.](/docs/configuration/librechat_yaml/object_structure/custom_endpoint#dropparams)
- The example includes a model list, which was last updated on 3 July 2024, for your convenience.

```yaml
    - name: "Perplexity"
      apiKey: "${PERPLEXITY_API_KEY}"
      baseURL: "https://api.perplexity.ai/"
      models:
        default: [
          "sonar-deep-research",
          "sonar-reasoning-pro",
          "sonar-reasoning",
          "sonar-pro",
          "sonar",
          "r1-1776"
          ]
        fetch: false # fetching list of models is not supported
      titleConvo: true
      titleModel: "llama-3-sonar-small-32k-chat"
      summarize: false
      summaryModel: "llama-3-sonar-small-32k-chat"
      dropParams: ["stop", "frequency_penalty"]
      modelDisplayLabel: "Perplexity"
```

![image](https://github.com/danny-avila/LibreChat/assets/32828263/6bf6c121-0895-4210-a1dd-e5e957992fd4)