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Nano Banana Pro API

Gemini 3 Pro Image — studio-grade generation and editing up to 4K

FromUp to −12%
$0.123/imgOfficial price $0.14

per image · 1K

Try Nano Banana Pro

Runs on your balance at the price shown on the button. Results are saved to your account.

Open full-screen Studio
0/5000

Output image shape.

Output size: 1K ≈ 1 megapixel, 2K ≈ 4 MP, 4K ≈ 16 MP.

Estimated cost…

Create a free account with Google or email — pay only for what you generate.

Your image will appear here

Write a prompt, pick your settings and hit Run. You only pay for successful generations.

What is Nano Banana Pro?

Nano Banana Pro (Gemini 3 Pro Image) creates and edits images up to 4K with accurate text, world knowledge and consistent characters across up to 14 input images.

Up to 4K
1K, 2K and 4K output
Legible text
Posters, diagrams, labels
14 inputs
Multi-image composition
Consistency
Characters stay on-model

Thinks before it draws

Nano Banana Pro uses Gemini 3 Pro's reasoning to plan the image: infographics, diagrams, posters and menus come out with legible, correctly spelled text and sensible layouts.

Edit and combine

Blend up to 14 images — people, products, styles — while keeping identities consistent, or make precise local edits (lighting, camera angle, background) in plain language.

Nano Banana Pro pricing

Pay per image. No subscription. Failed generations are refunded automatically.

TierOfficial priceCheaper Gen.
1K
≈1 MP
$0.14/img$0.123/img
2K
≈4 MP
$0.14/img$0.123/img
4K
≈16 MP
$0.246/img$0.217/img
  • Official price: Gemini API list price for gemini-3-pro-image ($120 / 1M image output tokens: $0.134 per 1K or 2K image, $0.24 per 4K image; input $2 / 1M, thinking $12 / 1M tokens). Prices verified 2026-10-16.
  • Prices include the prompt and the model's reasoning tokens; each input image adds about $0.002.

Specifications

Resolutions
1K · 2K · 4K
Aspect ratios
1:1 · 2:3 · 3:2 · 3:4 · 4:3 · 4:5 · 5:4 · 9:16 · 16:9 · 21:9
Edit inputs
Up to 14 images
Model id (Google)
gemini-3-pro-image
Released
Nov 20, 2025

Use Nano Banana Pro via API

One request to start a job, one to fetch the result. Same shape for every model.

Full API reference
import os, time, requests

API = "https://cheapergen.com/api/v1"
headers = {"Authorization": f"Bearer {os.environ['CHEAPERGEN_API_KEY']}"}

# 1. Submit the job
job = requests.post(f"{API}/run/google/nano-banana-pro/text-to-image", headers=headers, json={
    "prompt": "A cozy ramen shop at night in the rain, warm light spilling onto wet pavement, a neon sign that reads “OPEN”, photorealistic",
    "aspect_ratio": "1:1",
    "resolution": "1K"
}).json()

# 2. Poll until it finishes (or pass "webhook_url" and skip polling)
while job["status"] in ("queued", "running"):
    time.sleep(3)
    job = requests.get(f"{API}/generations/{job['id']}", headers=headers).json()

print(job["status"], job["output"]["images"][0]["url"] if job["status"] == "succeeded" else job["error"])

Example prompts

Hit “Try it” to load a prompt into the playground above.

  • An infographic explaining how coffee is made, from bean to cup, clean flat illustration with clear labels

    Try it
  • Movie poster for a sci-fi film called “ORBITAL”, astronaut silhouette against a ringed planet, bold title typography

    Try it
  • Product shot of a perfume bottle on black volcanic rock with splashing water, studio lighting, 4K detail

    Try it
  • A cozy isometric bakery interior with tiny people, warm light, every shelf labeled

    Try it

Nano Banana Pro FAQ

Nano Banana Pro is billed per generated image at Google's rates for the output resolution; the prompt and each input image add a small amount of input tokens. Failed or blocked generations are not charged.

Yes — use Image Edit with one or more input images and describe the change in plain language. It can combine several images (products, people, places) into one scene and keeps details consistent.

Yes. Requests run on Google's Gemini image model through an official Google channel — the same model as the Gemini API, at a lower price.

Yes, subject to Google's Generative AI terms and our Terms of Service. Images carry Google's invisible SynthID watermark.

Nano Banana Pro is developed by Google. Cheaper Gen. provides API access through official upstream endpoints and does not own the model. Trademarks belong to their respective owners. · Markdown · OpenAPI