ChatVertex

ChatVertex(
    model=None,
    project=None,
    location=None,
    api_key=None,
    system_prompt=None,
    kwargs=None,
)

Chat with a Google Vertex AI model.

Prerequisites

NotePython requirements

ChatGoogle requires the google-genai package: pip install "chatlas[vertex]".

NoteCredentials

To use Google’s models (i.e., Vertex AI), you’ll need to sign up for an account with Vertex AI, then specify the appropriate model, project, and location.

Vertex AI typically authenticates via Application Default Credentials (ADC). You can also pass a google.auth.credentials.Credentials object via kwargs:

import google.auth

credentials, project = google.auth.default()
chat = ChatVertex(
    project=project,
    location="us-central1",
    kwargs={"credentials": credentials},
)

Parameters

Name	Type	Description	Default
model	Optional[str]	The model to use for the chat. The default, None, will pick a reasonable default, and warn you about it. We strongly recommend explicitly choosing a model for all but the most casual use.	None
project	Optional[str]	The Google Cloud project ID (e.g., “your-project-id”). If not provided, the GOOGLE_CLOUD_PROJECT environment variable will be used.	None
location	Optional[str]	The Google Cloud location (e.g., “us-central1”). If not provided, the GOOGLE_CLOUD_LOCATION environment variable will be used.	None
system_prompt	Optional[str]	A system prompt to set the behavior of the assistant.	None

Returns

Name	Type	Description
	Chat	A Chat object.

Examples

import os
from chatlas import ChatVertex

chat = ChatVertex(
    project="your-project-id",
    location="us-central1",
)
chat.chat("What is the capital of France?")