> ## Documentation Index
> Fetch the complete documentation index at: https://llm-tools.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Vertex AI

The libaray supports the Gecko Embedding model on [VertexAI](https://cloud.google.com/vertex-ai/generative-ai/docs/embeddings/get-text-embeddings) with 768 dimensions.

To use this model, you need to authenticate to Vertex AI on GCP. Refer [here](/components/llms/azure-openai) on how to do this. Once done, follow these steps -

## Install VertexAi addon

```bash theme={null}
npm install @llm-tools/embedjs-vertexai
```

## Usage

```ts theme={null}
import { RAGApplicationBuilder } from '@llm-tools/embedjs';
import { GeckoEmbeddings } from '@llm-tools/embedjs-vertexai';
import { HNSWDb } from '@llm-tools/embedjs-hnswlib';

const app = await new RAGApplicationBuilder()
.setEmbeddingModel(new GeckoEmbeddings())
```