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Integrations · Class

ChatVertexAI

ChatVertexAI connects LangChain.js to Gemini Enterprise Agent Platform chat models through Google Cloud. It supports chat calls, streaming, tools, structured output, and multimodal input, but new code should use ChatGoogle.

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Syntax

new ChatVertexAI({ model, temperature, maxRetries, authOptions })
await model.invoke(input)

In-depth API docs are only for subscribers: parameters, examples, common mistakes and interview practice.

Subscribe
  • ChatGoogle
  • @langchain/google-vertexai-web
  • @langchain/core
  • Google Search retrieval
  • Vertex AI Search data store
  • Context caching

Source: ChatVertexAI integration. Checked 2026-11-03.