Gemini 3.1 Flash Image (Nano Banana 2)

Approved Data Classifications

Description

Gemini 3.1 Flash Image is a member of the Gemini series of models, a suite of highly-capable, natively multimodal reasoning models. Gemini 3.1 Flash Image can comprehend input from different information sources, including text, images, audio and video. Image and text output is generated in the response.

Capabilities

Model	Release Date	Input	Output	Context Length	Cost (per 1 million tokens / per image)
gemini-3.1-flash-image	Feb 2026	Text, Image	Text, Image	up to 1M	$0.50/1M input (text/image) $0.067 per image (1024x1024)

info

• 1M represents 1 Million Tokens
• Image inputs are charged at 1120 tokens ($0.0006) per input image
• Image output costs scale by output image resolution - 1120 tokens ($0.067) for 1K (roughly 1MP)

Availability

Cloud Provider

Usage

curl

curl -X POST https://api.ai.it.ufl.edu/v1/images/generations \
-H "Content-Type: application/json" \
-H "Authorization: Bearer <API_TOKEN>" \
-d '{
  "model": "gemini-3.1-flash-image",
  "prompt": "A cheerful alligator mascot in UF colors, poster style.",
  "size": "1024x1024"
}'

python

from openai import OpenAI

client = OpenAI(
    api_key="your_api_key",
    base_url="https://api.ai.it.ufl.edu/v1"
)

response = client.images.generate(
    model="gemini-3.1-flash-image",
    prompt="A cheerful alligator mascot in UF colors, poster style.",
    size="1024x1024",
    response_format="url"
)

image_url = response.data[0].url

javascript

import OpenAI from 'openai';

const openai = new OpenAI({
  apiKey: 'your_api_key',
  baseURL: 'https://api.ai.it.ufl.edu/v1'
});

const completion = await openai.images.generate({
    model: "gemini-3.1-flash-image",
    prompt: "A cheerful alligator mascot in UF colors, poster style.",
    size: "1024x1024",
    response_format: "url",
});

image_url = completion.data[0].url;