Nano Banana Pro API

About Nano Banana Pro

Nano Banana Pro is Google's Gemini 3 Pro Image model, released on 20 November 2025. It reasons about the request before drawing, which shows in dense text, diagrams and multi-part layouts, and it edits with up to fourteen reference images at 1K, 2K or 4K in ten aspect ratios.

Call it with the model name google/nano-banana-pro/text-to-image on POST /jobs/createTask, from 17 credits per image ($0.17). New accounts get 30 free credits to try it in the Playground first.

Introduction

Nano Banana Pro Text to image is Google's Gemini 3 Pro Image, released on 20 November 2025, generating images from a written prompt.

Choose a mode by starting material

Key features

Plans before it draws

The model works out the layout first, so prompts that describe where each element sits, or that quote several lines of text, come back arranged as written. In our cover test every quoted line landed where the prompt put it.

Request parameters

Pricing

Prices are in credits, the same credits you use on the website (1 credit = $0.01). The hold is taken when the task is accepted and settled to the actual charge when it finishes; failed tasks are refunded.

Each task is rounded up to whole credits, so one run at the lowest tier costs 17 credits per image ($0.17).

For an exact number before you run, send the same body to POST /jobs/quote.

Use cases

Editorial and brand portraits

Portraits that follow a named lens, aperture and light, for pitch decks, mood boards and campaign drafts.

Layouts with text

Posters, covers, menus and signage where several pieces of text share the frame with an image and each must be spelled right.

Diagrams and infographics

Labelled diagrams, simple charts and step-by-step visuals, where the reasoning step helps keep each label attached to the right part.

Prompt guide & pro tips

Write it like a shot list

Subject, wardrobe, setting, lens, aperture, light direction and grade, in that order, as full sentences.

Quote and position all text

Every word that must appear goes in quotes with a position; unquoted words are treated as description.

Be literal about the camera

An 85mm lens at f/1.4 with window light from the right is followed literally; vague words such as cinematic leave the choice to the model.

Describe people by what they wear and do

Pose, clothing, expression and where each person stands give the planning step enough to place everyone correctly.

API quick start

Call the Nano Banana Pro API in three steps

1. Create an API key. Sign in to PopNow and create a key in the API console. Keys start with sk-popnow- and use the same credits as the website.
2. Send the request. POST /jobs/createTask with model google/nano-banana-pro/text-to-image and an input object that follows the parameter table. The response returns a task ID straight away.
3. Get the result. Poll GET /jobs/recordInfo with the task ID, or pass a callBackUrl and we post the result to it. Download the output links when the task succeeds.

# 1. Create the task. Keep the Idempotency-Key if you retry after a network error.
export IDEMPOTENCY_KEY="$(uuidgen)"
curl -X POST https://api.popnow.ai/api/v1/jobs/createTask \
  -H "Authorization: Bearer $POPNOW_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $IDEMPOTENCY_KEY" \
  -d '{
  "model": "google/nano-banana-pro/text-to-image",
  "input": {
    "prompt": "A ceramic teapot on a linen cloth, soft window light, muted palette",
    "aspect_ratio": "16:9",
    "resolution": "1k"
  }
}'

# 2. Copy data.taskId from the response, then poll until state is succeeded, failed, canceled or expired.
TASK_ID="TASK_ID_FROM_RESPONSE"
curl "https://api.popnow.ai/api/v1/jobs/recordInfo?taskId=$TASK_ID" \
  -H "Authorization: Bearer $POPNOW_API_KEY"

Replace the prompt and any links with your own. The API tab has the response, polling and callback reference.

Nano Banana Pro API questions

All Nano Banana models

Nano Banana 2.1 is faster and less than half the price, with 8:1 banners and web search. Choose Pro when the layout is complicated or the text is dense.

• Nano Banana 2.1 APIGoogle's newest Nano Banana, sharp text and 4K outputFrom 8 credits per image
• Nano Banana Pro APIPlans the layout first: dense text, diagrams and 4K editsFrom 17 credits per image
• Nano Banana 2 APIFast Gemini images up to 4K, with up to 14 referencesFrom 6 credits per image

Other image APIs

• GPT Image 2.5 Sunburst APIOpenAI's quality-first model, up to 4K with clean textFrom 1 credit per image
• Seedream 5.0 Pro APIHigh-detail images and edits from up to ten referencesFrom 6 credits per image
• FLUX.2 Max APITop-tier FLUX: photoreal light and exact brand colorsFrom 11 credits per image
• Qwen Image 2.1 Pro APIUp to six detailed 2K images from one promptFrom 6 credits per image
• Qwen Image 2.1 Turbo APIFast 8-step renders, up to six per promptFrom 3 credits per image
• Qwen Image 2.1 APIOpen model with 2K output and transparent backgroundsFrom 4 credits per image

More about Nano Banana Pro

Try it

Nano Banana Pro AI Image Generator onlineCreate images with Nano Banana Pro in PopNow

Compare

Nano Banana 2.1 vs Nano Banana ProFLUX.2 Max vs Nano Banana Pro

Docs

Nano Banana Pro model ID and input schema in the API docsPopNow API quickstart: your first request in five minutesImage generation guide for the PopNow APIWebhooks: get Nano Banana Pro results without polling