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Vertex AI Models Chat Provider Wiki

Welcome to the documentation for the Vertex AI Models Chat Provider extension. This wiki explains how to install, configure, and use the extension inside VS Code, with a focus on Google Cloud Vertex AI model discovery, cost tracking, and workspace billing controls.

Why this extension exists

The extension makes Google Cloud Vertex AI models available through the native VS Code Chat panel without requiring API keys. It uses your configured GCP Project ID and Application Default Credentials to discover available Gemini and Claude models, track usage locally, and connect billing information to the correct project.

Tip: If you use multiple workspaces for different customers or internal projects, configure vertexAiChat.projectId inside each workspace to keep billing and model discovery aligned with the active project.