Configure Gemini model parameters

Generates text from an image using the Gemini model and returns the generated text. This example demonstrates how to set model configuration parameters.

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.

import base64
import vertexai

from vertexai.generative_models import GenerationConfig, GenerativeModel, Part

# TODO(developer): Update and un-comment below line
# PROJECT_ID = "your-project-id"
vertexai.init(project=PROJECT_ID, location="us-central1")

model = GenerativeModel("gemini-1.5-flash-002")

# Load example image from local storage
encoded_image = base64.b64encode(open("scones.jpg", "rb").read()).decode("utf-8")
image_content = Part.from_data(
    data=base64.b64decode(encoded_image), mime_type="image/jpeg"
)

# Generation Config
config = GenerationConfig(
    max_output_tokens=2048, temperature=0.4, top_p=1, top_k=32
)

# Generate text
response = model.generate_content(
    [image_content, "what is this image?"], generation_config=config
)
print(response.text)
# Example response:
# That's a lovely overhead shot of a rustic still life featuring blueberry scones.
# Here's a breakdown of what's in the image:
# * **Blueberry Scones:** Several freshly baked blueberry scones are arranged on
# a piece of parchment paper. They appear to be homemade and slightly crumbly.
# ...

What's next

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