Nano Banana Pro API
Gemini 3 Pro Image — studio-grade generation and editing up to 4K
Try Nano Banana Pro
Runs on your balance at the price shown on the button. Results are saved to your account.
Output image shape.
Output size: 1K ≈ 1 megapixel, 2K ≈ 4 MP, 4K ≈ 16 MP.
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.
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.
| Tier | Official price | Cheaper Gen. | You save |
|---|---|---|---|
1K ≈1 MP | $0.123/img | −12% | |
2K ≈4 MP | $0.123/img | −12% | |
4K ≈16 MP | $0.217/img | −12% |
- 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.
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
Movie poster for a sci-fi film called “ORBITAL”, astronaut silhouette against a ringed planet, bold title typography
Product shot of a perfume bottle on black volcanic rock with splashing water, studio lighting, 4K detail
A cozy isometric bakery interior with tiny people, warm light, every shelf labeled
Nano Banana Pro FAQ
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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
