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Google Vertex AI

docs/llm-providers/vertex.mdx

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Installation

Vertex AI requires the Google Cloud dependency. Install Strix with the vertex extra:

bash
pipx install "strix-agent[vertex]"

Setup

bash
export STRIX_LLM="vertex_ai/gemini-3-pro-preview"

No API key required—uses Google Cloud Application Default Credentials.

Authentication

Option 1: gcloud CLI

bash
gcloud auth application-default login

Option 2: Service Account

bash
export GOOGLE_APPLICATION_CREDENTIALS="/path/to/service-account.json"

Available Models

ModelDescription
vertex_ai/gemini-3-pro-previewBest overall performance for security testing
vertex_ai/gemini-3-flash-previewFaster and cheaper

Project Configuration

bash
export VERTEXAI_PROJECT="your-project-id"
export VERTEXAI_LOCATION="global"

Prerequisites

  1. Enable the Vertex AI API in your Google Cloud project
  2. Ensure your account has the Vertex AI User role