Nano Banana 2 (Gemini 3.1 Flash Image)
Google's fast multimodal model for image and text tasks.
GoogleImage ModelsClosed
Vision
Model page Updated 2026-06-18
About Nano Banana 2 (Gemini 3.1 Flash Image)
Built as a Flash variant in Google's Gemini lineup, this model emphasizes speed while supporting combined image and text modalities. It remains fully proprietary with no open weights released. The architecture focuses on streamlined inference for practical deployment scenarios.
Its strengths lie in rapid handling of visual content alongside textual context, making it suitable for real-time analysis workflows. Developers use it where low latency matters without sacrificing multimodal capability. Typical applications include image description, visual question answering, and document understanding.
Users integrate it through Google's APIs for tasks requiring both visual recognition and language reasoning. The fixed parameter count and closed nature keep it optimized for consistent performance across cloud environments.
How Nano Banana 2 (Gemini 3.1 Flash Image) compares
Nano Banana 2 (Gemini 3.1 Flash Image) (striped bar) vs other image models on intelligence, speed and price.
Price
USD per 1M output tokens · Lower is better · Nano Banana 2 (Gemini 3.1 Flash Image) ranks #3 of 8
$2.0
$2.5
$3.0
$3.0
$10.0
$12.0
$12.0
$15.0
Sources: Artificial Analysis (intelligence, speed) · OpenRouter (price).
Cost calculator
Estimate what Nano Banana 2 (Gemini 3.1 Flash Image) would cost for your usage.
$0.00200
per request
$20
estimated / month
Based on Nano Banana 2 (Gemini 3.1 Flash Image)'s $0.50/1M input · $3.00/1M output. Estimate only — actual cost varies by provider and caching.
Quick start
OpenRouter's API is OpenAI-compatible — most SDKs work by just swapping the base URL. Only the model slug changes between models.
JavaScript · openai
import OpenAI from "openai";
const client = new OpenAI({
baseURL: "https://openrouter.ai/api/v1",
apiKey: process.env.OPENROUTER_API_KEY,
});
const completion = await client.chat.completions.create({
model: "google/gemini-3.1-flash-image",
messages: [{ role: "user", content: "Hello!" }],
});
console.log(completion.choices[0].message.content);Model slug: google/gemini-3.1-flash-image
Editor's verdict
Our take on Nano Banana 2 (Gemini 3.1 Flash Image)
Nano Banana 2 (Gemini 3.1 Flash Image) is Google's proprietary image models with a 131K-token context window.
At $3.00 per 1M output tokens, it is mid-priced for its class.
It is available through Google's API and aggregators like OpenRouter.
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