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Nano Banana 2.1 API

Nano Banana 2.1 images by Google from a description and edits of your pictures: up to 10 references, quality up to 4K. Fourteen aspect ratios, including the elongated 1:4, 4:1, 1:8 and 8:1, plus auto, PNG or JPG output.

Developer: GoogleModel key in the API: banana_pro

For AI assistants:Download .mdAll documentation .mdOpen as text

Connect in three steps

  1. Get a keyCreate a key in the dashboard after you confirm your email. One key opens every model.
  2. Check the pricePOST /v1/price shows the cost of a run in advance, without charging you.
  3. Run a task and collect the resultPOST /v1/tasks starts a task, GET /v1/tasks/{id} shows its status and files.

Ready-to-use code

Replace YOUR_API_KEY with your key. The code starts a task and waits for the result. In cURL, repeat the second request with the id from the first response instead of TASK_ID until status becomes succeeded.

cURL
curl -X POST "https://api.cyhub.ai/v1/tasks" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  --data '{
  "model": "banana_pro",
  "settings": {
    "model": "nano-banana-2-1",
    "prompt": "Постер кофейни в стиле ретро, крупная надпись «Доброе утро»",
    "size": "3:4",
    "resolution": "2K"
  }
}'

curl "https://api.cyhub.ai/v1/tasks/TASK_ID" \
  -H "Authorization: Bearer YOUR_API_KEY"
Python
import time

import requests

API = "https://api.cyhub.ai/v1"
HEADERS = {"Authorization": "Bearer YOUR_API_KEY"}

body = {
    "model": "banana_pro",
    "settings": {
        "model": "nano-banana-2-1",
        "prompt": "Постер кофейни в стиле ретро, крупная надпись «Доброе утро»",
        "size": "3:4",
        "resolution": "2K",
    },
}

response = requests.post(f"{API}/tasks", json=body, headers=HEADERS, timeout=60)
response.raise_for_status()
task = response.json()
while task["status"] in ("queued", "running"):
    time.sleep(5)
    task = requests.get(f"{API}/tasks/{task['id']}", headers=HEADERS, timeout=30).json()
print(task["status"], task["result"])
Node.js
const API = "https://api.cyhub.ai/v1";
const HEADERS = { Authorization: "Bearer YOUR_API_KEY", "Content-Type": "application/json" };

const body = {
  "model": "banana_pro",
  "settings": {
    "model": "nano-banana-2-1",
    "prompt": "Постер кофейни в стиле ретро, крупная надпись «Доброе утро»",
    "size": "3:4",
    "resolution": "2K"
  }
};

async function main() {
  let response = await fetch(`${API}/tasks`, { method: "POST", headers: HEADERS, body: JSON.stringify(body) });
  if (!response.ok) throw new Error(await response.text());
  let task = await response.json();
  while (task.status === "queued" || task.status === "running") {
    await new Promise((resolve) => setTimeout(resolve, 5000));
    response = await fetch(`${API}/tasks/${task.id}`, { headers: HEADERS });
    task = await response.json();
  }
  console.log(task.status, task.result);
}

main();
Get a key

Price before the run

Prices as of 15.10.2026: from 10 ₽. POST /v1/price shows the exact price of your settings.

ModePrice
Nano Banana 2.1from 10 ₽

Send the same settings to POST /v1/price: the response shows the price of the run without charging you.

cURL
curl -X POST "https://api.cyhub.ai/v1/price" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  --data '{
  "model": "banana_pro",
  "settings": {
    "model": "nano-banana-2-1",
    "prompt": "Постер кофейни в стиле ретро, крупная надпись «Доброе утро»",
    "size": "3:4",
    "resolution": "2K"
  }
}'
  • amount_minor: the price of the run in minor units (kopecks for rubles)
  • currency: the wallet currency
  • available_minor: how much your balance has for new tasks right now

Nano Banana 2.1

The newest version and the default: fourteen aspect ratios, including the elongated 1:4, 4:1, 1:8 and 8:1, plus auto, up to 4K, up to 10 references.

Value of the model field: nano-banana-2-1

Price in this mode from 10 ₽.

Parameters

Model parameters go inside settings. Omitted optional fields take their default values.

promptRequired

What to draw, or what to do with the reference images.

Type: StringMinimum characters: 1Maximum characters: 5000
resolutionOptional

Quality: 1K, 2K or 4K. The price depends on it.

Type: StringAllowed values: 1K2K4KDefault: "1K"
output_formatOptional

Result file format.

Type: StringAllowed values: pngjpgDefault: "png"
google_searchOptional

Banana 2 only: let the model search Google when it needs current facts or real places.

Type: BooleanDefault: false
sizeOptional

Aspect ratio. auto: the model picks it, with a reference usually the same as the reference.

Type: StringAllowed values: auto1:11:41:82:33:23:44:14:34:55:48:19:1616:921:9Default: "1:1"
image_urlsOptional

Reference image URLs, up to 10.

Type: List (String, uri)Maximum items: 10

Parameters not listed here are not accepted: the response is 422 unknown_setting.

Input

  • References are URLs of JPEG, PNG or WebP images, up to 30 MB each.
FieldAcceptsFormatsFilesFile size up to
image_urlsImagesjpeg, jpg, png, webp1030 MB
How to send files

Request example

Send this JSON to POST /v1/tasks with your API key. To check the price first, send the same JSON to POST /v1/price.

Poster with lettering

JSON
{
  "model": "banana_pro",
  "settings": {
    "model": "nano-banana-2-1",
    "prompt": "Постер кофейни в стиле ретро, крупная надпись «Доброе утро»",
    "size": "3:4",
    "resolution": "2K"
  }
}

The price is calculated when the task is accepted, currency RUB.

Complete generation example

Output

  • One image per run in the chosen format.
KindFormatsHow manyNote
imagepng, jpg1The format is set by output_format.

A finished task as GET /v1/tasks/{id} returns it (some fields left out). The caption may sit on the task or on a single file and may be empty; the model picks the file name.

JSON
{
  "id": "7c9e6679-7425-40de-944b-e07fc1f90ae7",
  "status": "succeeded",
  "finished_at": "2026-10-01T12:03:41+00:00",
  "result": {
    "caption": "Caption of the result: the model and its settings",
    "texts": [],
    "files_expire_at": "2026-10-08T12:03:41+00:00",
    "files_expired": false,
    "artifacts": [
      {
        "index": 0,
        "kind": "image",
        "filename": "image.png",
        "size": 1843200,
        "caption": "",
        "download_path": "/v1/tasks/7c9e6679-7425-40de-944b-e07fc1f90ae7/artifacts/0"
      }
    ]
  }
}
How to read the result and download files

See also

Try Nano Banana 2.1 through the API

One key opens every CyHUB model. Payment in rubles, and you see the price before the run.

Get an API key