Create a chat session with a Generative Model

This sample demonstrates how to use Generative Models to create a chat session.

Explore further

For detailed documentation that includes this code sample, see the following:

• Text generation

Code sample

Python

Before trying this sample, follow the Python setup instructions in the Vertex AI quickstart using client libraries. For more information, see the Vertex AI Python API reference documentation.

To authenticate to Vertex AI, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

from google import genai
from google.genai.types import HttpOptions, ModelContent, Part, UserContent

client = genai.Client(http_options=HttpOptions(api_version="v1"))
chat = client.chats.create(
    model="gemini-2.0-flash-001",
    history=[
        UserContent(parts=[Part(text="Hello")]),
        ModelContent(
            parts=[Part(text="Great to meet you. What would you like to know?")],
        ),
    ],
)
response = chat.send_message("Tell me a story.")
print(response.text)
# Example response:
# Okay, here's a story for you:
# ...

What's next

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