Using Nano Banana 2 (Gemini 3.1 Flash Image) on Google AI Studio

Quick Start

1. 1
   Create an account at Google AI Studio and generate an API key.
2. 2
   Use the Google AI Studio SDK or REST API to call gemini-3.1-flash-image — see the documentation for request format.
3. 3
   You'll be billed $0.50/1M input, $60.00/1M output tokens.

Code Examples

import os
from google import genai

client = genai.Client(api_key=os.environ["GOOGLE_API_KEY"])
response = client.models.generate_content(
    model="gemini-3.1-flash-image",
    contents="Hello"
)
print(response.text)

About Google AI Studio

Google AI Studio is a model prototyping environment and API access point for Gemini models, offering an inference playground for developers to test and build AI applications.

Pricing on Google AI Studio

Capabilities

About Nano Banana 2 (Gemini 3.1 Flash Image)

Nano Banana 2 is the GA Gemini 3.1 Flash Image model for image generation and editing through the Gemini API. It accepts text, image, and PDF inputs, returns text and images, supports search grounding and thinking, and replaces the gemini-3.1-flash-image-preview model retiring on 2026-06-25.