Google · Image model

Nano Banana / Nano Banana Pro

Nano Banana is Google's family of Gemini native image generation models

Generate on Coinis Read the docs

One API key. Every model.

4K per image
Example
AI image
Commercial use included Verified May 26, 2026 Outputs are yours No training on your data
Endpoints

Start building with Nano Banana / Nano Banana Pro.

One model. Three ways to call it. Same key, same bill.

Nano Banana (Gemini 2.5 Flash Image)

Image generation

One call. Same key. Same bill.

$0.07 / image

Nano Banana Pro (Gemini 3 Pro Image, 1K/2K)

Image generation

One call. Same key. Same bill.

$0.23 / image

Gemini 2.5 Flash Image (Nano Banana)

Image generation

One call. Same key. Same bill.

$0.07 / image

MIN

Image generation

One call. Same key. Same bill.

$0.23 / image

MAX

Image generation

One call. Same key. Same bill.

$0.23 / image

4K

Image generation

4K. One call. Same key. Same bill.

$0.23 / image

Capabilities

What it does best.

Nano Banana capabilities

Generation modes

  • Text-to-image generation across all three Nano Banana tiers[^1]
  • Image-to-image editing: supply an image plus a text prompt, receive an edited image[^1]
  • Multi-turn conversational editing: iterate on images inside a single chat session[^1]

Resolutions

  • Output at 512px (0.5K), 1024px (1K), 2048px (2K), or 4096px (4K). selectable per request[^2]

Aspect ratios

  • Supported: 1:1, 1:4, 1:8, 2:3, 3:2, 3:4, 4:1, 4:3, 4:5, 5:4, 8:1, 9:16, 16:9, and 21:9[^2]

Reasoning and grounding (Pro tier only)

  • Nano Banana Pro uses advanced Thinking to follow complex, multi-step instructions[^4]
  • Grounding with Google Search enables factually accurate image content drawn from real-time web data[^4]

Text-in-image fidelity

  • Nano Banana Pro renders readable text inside images with high accuracy[^4]
  • Flash tiers handle basic text but are not optimized for complex in-image typography[^3]

SDKs

  • Official SDKs: Python, JavaScript, Go, Java, C#, and REST[^2]

Limits and caveats

  • Input token limit: 65,536 tokens. Output token limit: 32,768 tokens[^3]
  • All generated images include a SynthID invisible watermark. Cannot be disabled[^2]
  • No Function Calling, no Live API, no Context Caching on any Nano Banana tier[^3]
  • Nano Banana (Gemini 2.5 Flash Image) does not support Search Grounding[^3]
API

Call Nano Banana / Nano Banana Pro in three lines.

One key. One base URL. Same SDK shape you already use. 

# 1. set your key
export COINIS_API_KEY="sk_live_..."

# 2. call the model
curl https://api.app.coinis.com/v1/image/generate \
  -H "Authorization: Bearer $COINIS_API_KEY" \
  -d '{"prompt":"neon city, rain, tracking shot"}'
import { Coinis } from "@coinis/sdk";
const coinis = new Coinis(process.env.COINIS_API_KEY);

const job = await coinis.image.generate({
  model: "models/google/nano-banana",
  prompt: "neon city, rain, tracking shot",
});
from coinis import Coinis
coinis = Coinis(os.environ["COINIS_API_KEY"])

job = coinis.image.generate(
    model="models/google/nano-banana",
    prompt="neon city, rain, tracking shot",
)
Response 
{
  "id": "gen_8fa2c1",
  "status": "succeeded",
  "model": "models/google/nano-banana",
  "output": {
    "image_url": 
                "https://cdn.coinis.com/gen_8fa2c1.mp4"
              
              ,
    "format": "mp4"
  },
  "tokens_used": 10
}

Already on another provider's SDK? Change the host. Keep the call.

Pricing

Token pricing. No surprises.

One wallet across every model. No API accounts to juggle.

Nano Banana / Nano Banana Pro · Nano Banana (Gemini 2.5 Flash Image)
0.7 tokens
per image · $0.07
Photoreal
$0.07 / image
One key. Every model. One invoice. 1 token = $0.10
1 image ≈ 1 tokens ($0.07)
Start free. 15 tokens a week.

No credit card.

Why pay through Coinis
  • One wallet for every model. No API keys. No separate bills.
  • Generate ads. Launch to Meta. Track in one place.
  • On-brand output from your Brand Profile.

1 token = $0.10 pay-as-you-go. Less on a plan.

Standard vs Fast

Pick the run for the job.

Nano Banana (Gemini 2.5 Flash Image)

Final renders, studios
Resolution —
Price $0.07 / image

Nano Banana Pro (Gemini 3 Pro Image, 1K/2K)

Rapid tests, high volume
Resolution —
Price $0.23 / image
Use cases

Two buyers. One model.

For builders

Resell every model. One key. One bill.

Unified API across video, image, audio, and LLM.

Generate 500 variants overnight.

Async queue plus webhooks. Batch at scale.

White-label the output.

Ship it under your brand. Outputs are yours.

For creatives

Ship a Reel before lunch.

Prompt to platform-native clip in minutes.

Same product. Ten formats.

One generation, every aspect ratio.

Commercial UGC without a creator.

Authentic selfie-style ads, on brand.

High-volume ad creative and UGC pipelines Nano Banana (Gemini 2.5 Flash Image) is built for high-volume, low-latency workflows. Run hundreds of storyboard frames, ad variants, or UGC product shots in a single batch at $0.066/image on Coinis.[^3]

Professional mockups and accurate text rendering Nano Banana Pro (Gemini 3.1 Pro Image) uses advanced reasoning to follow complex design briefs and render legible text inside images. Use it for product packaging mockups, banner ads with copy, or detailed UI assets where text accuracy matters.[^4]

Factual and search-grounded visuals Nano Banana Pro's Google Search grounding produces images tied to real-world data. Use it for news-article magazine layouts, live-data infographics, and campaign creatives where factual accuracy is required.[^4]

Stylized icons, stickers, and UI assets All Nano Banana tiers handle stylized illustration work. Generate app icons, sticker packs, and UI assets across styles including anime, pencil-sketch, and claymation in a single request.[^2]

Photoreal product photography and style transfer Generate photoreal product shots against custom backgrounds, apply style transfers across a product catalog, or mix styles in a single composition. Nano Banana powers Coinis's product-shots, ad-clone, and smart-resize operations directly.[^1]

Renders in seconds. Set a seed. Get the same frame back.

Outputs are yours. Sell them.

Safe for paid ads.

Your prompts are never used for training.

FAQ

Nano Banana / Nano Banana Pro FAQs

How much does Nano Banana cost per image on Coinis vs. the Gemini API directly?

On Coinis, Nano Banana (Gemini 2.5 Flash Image) is priced at $0.066 per image. Google's direct API price is $0.039 per image at 1K resolution. The Coinis price bundles platform access, workflow operations like smart-resize and ad-clone, and usage tooling on top of the raw model cost.

What is the difference between Nano Banana and Nano Banana Pro?

Nano Banana (Gemini 2.5 Flash Image) is optimized for speed and high-volume output at $0.066/image on Coinis. Nano Banana Pro (Gemini 3.1 Pro Image) adds advanced Thinking-grade reasoning, accurate text rendering inside images, and real-time Google Search grounding, starting at $0.228/image on Coinis. Choose Nano Banana for throughput-focused pipelines and Nano Banana Pro when complex instructions, in-image typography, or factual accuracy are required.

Is there a Nano Banana API I can call from my own backend?

Yes. Send a POST request to https://api.app.coinis.com/v1/image/generate with model set to nano-banana or nano-banana-pro. Official SDKs for Python, JavaScript, Go, Java, C#, and REST are supported. See the /api/image/generate documentation for request schema and authentication details.

Can Nano Banana Pro render readable text inside images?

Yes. Nano Banana Pro (Gemini 3.1 Pro Image) is specifically designed for high-fidelity text rendering within images, using its advanced reasoning capability to follow typographic instructions accurately. The base Nano Banana (Gemini 2.5 Flash Image) tier handles basic text but is not optimized for complex in-image copy.

Does Nano Banana support 4K image generation, and what does it cost?

4K output is available on the Nano Banana Pro tier via the gemini-3-pro-image-preview-4k variant. See the variants table on this page for current retail pricing. The base Nano Banana (Gemini 2.5 Flash Image) and Nano Banana 2 (Gemini 3.1 Flash Image) tiers also support 4K output at their respective per-resolution rates.

Do Nano Banana images include a watermark?

Yes. Every image generated by any Nano Banana model includes Google's SynthID invisible digital watermark. SynthID is not visible to the human eye and does not affect image quality, but it cannot be disabled. This applies across all tiers and all resolutions.

Which Nano Banana variant should I pick for high-volume ad creative pipelines?

Nano Banana (Gemini 2.5 Flash Image) is the right choice for high-volume ad pipelines. It is explicitly optimized for low-latency, high-throughput image generation at $0.066/image on Coinis. If your pipeline requires readable text in creatives, accurate brand-name rendering, or factually grounded visuals, step up to Nano Banana Pro at $0.228/image.

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Catalog
Upscale this Edit a frame Add a voiceover

Start free

Your wallet. Every model. One call away.

Start free. 15 tokens a week. No card.

Generate on Coinis

No credit card.

Pricing and capabilities verified 2026-05-26. Read the docs .