Nano Banana 2 (Gemini 3.1 Flash Image Preview)
Google Nano Banana 2 (Gemini 3.1 Flash Image Preview) — pricing, 66k context window, API cost calculator and alternatives.
By Google
Specs
- Provider
- Slug
- google/gemini-3-1-flash-image-preview
- Capabilities
- vision, json_mode
Pricing freshness
- Tier
- standard
- Currency
- USD
- As of
- 2026-05-08 17:08 UTC
Pricing history
Tracking Nano Banana 2 (Gemini 3.1 Flash Image Preview) pricing since 2026-05-08. We'll plot the chart here once it changes.
Quickstart — call Nano Banana 2 (Gemini 3.1 Flash Image Preview) from your app
curl "https://generativelanguage.googleapis.com/v1beta/models/gemini-3-1-flash-image-preview:generateContent" \
-H "Content-Type: application/json" \
-H "x-goog-api-key: $GOOGLE_API_KEY" \
-d '{
"contents": [{"parts": [{"text": "Hello!"}]}]
}'Official docs: https://ai.google.dev/api/generate-content
# pip install google-genai
from google import genai
client = genai.Client() # reads GOOGLE_API_KEY from env
resp = client.models.generate_content(
model="gemini-3-1-flash-image-preview",
contents="Hello!",
)
print(resp.text)Official docs: https://ai.google.dev/api/generate-content
// npm install @google/genai
import { GoogleGenAI } from "@google/genai";
const ai = new GoogleGenAI({ apiKey: process.env.GOOGLE_API_KEY });
const resp = await ai.models.generateContent({
model: "gemini-3-1-flash-image-preview",
contents: "Hello!",
});
console.log(resp.text);Official docs: https://ai.google.dev/api/generate-content
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Frequently asked questions
What is Nano Banana 2 (Gemini 3.1 Flash Image Preview)?
Nano Banana 2 (Gemini 3.1 Flash Image Preview) is a large language model API from Google with a 66k-token context window. It costs $0.5 per 1M input tokens and $3 per 1M output tokens.
How much does Nano Banana 2 (Gemini 3.1 Flash Image Preview) cost?
Nano Banana 2 (Gemini 3.1 Flash Image Preview) is priced at $0.5 per 1M input tokens and $3 per 1M output tokens via the Google API. A 50/50 input/output workload of 1M total tokens costs about $1.75.
What is the context window of Nano Banana 2 (Gemini 3.1 Flash Image Preview)?
Nano Banana 2 (Gemini 3.1 Flash Image Preview) supports up to 66k tokens of context per request — roughly 131 pages of English text or 8192 lines of code at a typical density.
Does Nano Banana 2 (Gemini 3.1 Flash Image Preview) support vision, tool use, or JSON mode?
Nano Banana 2 (Gemini 3.1 Flash Image Preview) supports image input (vision) and structured JSON mode. It does not support tool/function calling.
Who makes Nano Banana 2 (Gemini 3.1 Flash Image Preview)?
Nano Banana 2 (Gemini 3.1 Flash Image Preview) is built and operated by Google. Pricing, context window, and capabilities on this page are refreshed nightly from Google's public catalog.
Can I self-host Nano Banana 2 (Gemini 3.1 Flash Image Preview)?
Nano Banana 2 (Gemini 3.1 Flash Image Preview) is API-only — its weights are not publicly distributed by Google, so it cannot be self-hosted today.