Nano Banana 2.1 — sharper text and edits, 1K to 4K at one price
Nano Banana 2.1 is Google's update to Nano Banana 2 for text-to-image and editing, with cleaner text rendering and up to 14 references. Every image costs $0.03, from 1K to 4K.
- Text to image
- Image editing
- 1K to 4K
- 14 aspect ratios
- Up to 14 references
- Thinking levels
Try Nano Banana 2.1 before you write any code
Run Nano Banana 2.1 with the exact request your code will send. Every parameter the API takes is here.
gemini-nano-banana-2.1$0.03 /image
Describe an image, add references if you have them, and submit once. The result appears when the task completes.
What to create or change. Subject, setting, lighting and style.
Images, videos or PDFs the model should read. Files are uploaded and sent as URLs.
Up to 14, sent as fileData URLs.
Default matches your first reference, otherwise 1:1.
Output resolution: 1K, 2K or 4K. 1K is the default. Same price at every size.
Image only, or image with a short text reply.
Standing rules for the model, such as a house style.
Greyed-out options relax content filtering. They are available through the API only, not in the playground.
0–2. Leave empty for the model default.
0–1. Leave empty for the model default.
Whole number, 1 or more.
Whole number. Reuse it to reproduce a result more closely.
Caps text and thinking output.
One per line, up to 5.
Only 1: one request returns one image.
How many tokens each reference uses. Lower is cheaper.
Return the model's thought summary with the image.
MEDIUM is the default. MINIMAL answers soonest; HIGH reasons more before drawing.
Ground the image in live search results: webSearch, imageSearch or both. Same price per image.
One flat price per delivered image, whatever the size, thinking level or prompt.
Try one of these prompts
Sample images generated with Nano Banana 2.1 through this API
Nano Banana 2.1 pricing
Nano Banana 2.1 has one price per delivered image. A 1K draft and a 4K final cost the same, and the thinking level does not change it.
- Standard
- $0.03/image
- Standard
- 666images
The price comes from the rate that bills your account. Failed requests are not charged.
Usage is shown on every task: a measured 1K render reported 1177 text and thinking tokens and 22 prompt tokens beside the image. None of it changes the price.
Nano Banana 2.1 cost by image size
Google publishes a fixed image-token count per size. On SeedRouter the price per image is the same for all three.
| Category | Price · 1 image |
|---|---|
| 1K | $0.03 |
| 2K | $0.03 |
| 4K | $0.03 |
One flat price per Nano Banana 2.1 image at 1K, 2K and 4K.
Price your own Nano Banana 2.1 request
Pick a size and an aspect ratio. The figure comes from the live per-image price, so it moves when the price does.
A pre-submit estimate. Each delivered image is charged once, at any size.
What is Nano Banana 2.1?
Nano Banana 2.1 is Google's update to Nano Banana 2 (Gemini 3.1 Flash Image), released on October 6, 2026. Google lists better visual quality, more accurate text and infographic layouts, steadier characters across multi-turn edits, and cleaner wide and panoramic images at 2K and 4K.
On SeedRouter you call Nano Banana 2.1 with Google's own generateContent request body. Submit once, get a task ID, and collect a hosted image URL when the task completes.
Google model name: Gemini Nano Banana 2.1 · Model ID: gemini-nano-banana-2.1 · Input limit: 131,072 tokens.
Two ways to use Nano Banana 2.1
Call the API from your backend, or hand the job to a coding agent.
Call the API
Send the Nano Banana 2.1 request from your server, keep the task ID, and read the finished image from the task.
- 1Create an API key
- 2POST the request body
- 3Poll the task until it completes
Let an agent do it
Copy a ready prompt into Claude Code, Codex or Cursor. It asks before spending and downloads the result.
- 1Copy the prompt
- 2Fill in what you want
- 3Approve the request
What Nano Banana 2.1 is good at
Everything Nano Banana 2 does, with cleaner text and steadier edits.
Text that reads right
Menus, posters, labels and infographics come out of Nano Banana 2.1 with fewer misspelled or warped words.
Edit what you already have
Add a photo and describe the change. Nano Banana 2.1 keeps the parts you did not mention.
Up to 14 references
Mix products, people and settings in one prompt, with up to 10 object references.
Wide formats without seams
Google fixed the tiling artifacts on 1:4, 4:1, 1:8 and 8:1 images at 2K and 4K, so banners and strips render cleanly.
Choose how hard it thinks
Set the thinking level to MINIMAL for quick drafts or HIGH for dense layouts. MEDIUM is the default.
Consistent characters
Keep up to four people recognisable across a series of Nano Banana 2.1 images and edits.
What teams use Nano Banana 2.1 for
Product shots
Turn one packshot into lifestyle scenes, seasonal variants and clean catalogue images with Nano Banana 2.1.
Social content
Nano Banana 2.1 generates every aspect ratio a campaign needs from one brief.
Ads with copy
Put the headline and offer in the prompt and get a layout with readable text to test before a shoot.
Infographics
Ask Nano Banana 2.1 for a labelled diagram or chart-style explainer for a slide or article.
Banners and headers
Render 8:1 website headers and 1:4 vertical displays at 4K without stitching tiles.
Mockups
Place a logo or screen on packaging, signs and devices with a Nano Banana 2.1 edit.
Start with Nano Banana 2.1 in four steps
- 01
Create a key
Sign in, top up any amount, and create an API key. Credits never expire.
- 02
Send one request
POST the Nano Banana 2.1 body to /v1/images/generations with your prompt and any reference URLs.
- 03
Poll the task
Keep the task ID and check it every few seconds until the status is completed.
- 04
Download the image
Save the hosted image URL from the task output to your own storage.
Nano Banana 2.1 at a glance
The facts that decide whether Nano Banana 2.1 fits the job.
- Output sizes
- 1K, 2K, 4K
- Aspect ratios
- 14 (1:8 to 8:1)
- References
- Up to 14
- Input types
- Text, image, video, PDF
- Thinking
- MINIMAL, MEDIUM (default) or HIGH; optional thought summaries
- Billing
- One flat price per image
Need 512px drafts? See Nano Banana 2. Need up to five character references or three style references? See Nano Banana Pro.
What to know before you start
One image per request
Nano Banana 2.1 returns one image per call. Send several requests for a batch.
Google Search grounding
Turn on the googleSearch tool to ground Nano Banana 2.1 images in live web or image results. The price per image does not change.
References are URLs
Send Nano Banana 2.1 references as public HTTP(S) links, not base64. The Playground uploads for you.
Results arrive by task
A Nano Banana 2.1 request returns a task ID first. Poll it until the image is ready.
Why run Nano Banana 2.1 on SeedRouter
One price at every size
Every Nano Banana 2.1 image costs the same at 1K, 2K or 4K, so the bill is easy to predict.
Failed requests are free
If a task ends failed, nothing is charged. You only pay for images that are delivered.
Credits never expire
Top up once and use the balance whenever you need it. No subscription.
Hosted results
Finished images come back as URLs on our CDN. Keep a copy of anything you need long term.
One key for every model
The same key and balance work for the other image models in the catalogue.
Other image models on SeedRouter
Same key, same balance, same task API.
Create and edit images with GPT Image 2 on SeedRouter. Use text prompts, reference images and transparent backgrounds, with a live playground and usage-based pricing.
View pricingGenerate and edit images with GPT Image 2.5 Flare or Sunburst on SeedRouter. Six quality steps up to max, transparent backgrounds, a live playground and pay-as-you-go pricing.
View pricingCreate and edit images with Nano Banana 2 (Gemini 3.1 Flash Image): 512px to 4K, 14 aspect ratios, up to 14 references. Pay per image or per token.
View pricingCreate and edit images with Nano Banana Pro (Gemini 3 Pro Image): 1K to 4K output, built-in thinking, up to 14 references. Pay per image or per token.
View pricingCreate and edit images with Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image), Google's fastest and cheapest image model: 1K output, 14 aspect ratios.
View pricingNano Banana 2.1 guides
Practical guides to choosing, pricing and integrating the model.
Nano Banana 2.1 API pricing: Google token rates, cost per image at 1K, 2K and 4K, what thinking adds, Batch and Search costs, and a request with polling.
Nano Banana 2.1 vs Nano Banana 2: what Google changed, model card benchmarks, the price per image at each size, and when to switch before the shutdown.
Nano Banana 2.1 FAQ
What is Nano Banana 2.1?+
Nano Banana 2.1 is Google's image generation and editing model released on October 6, 2026 as the update to Nano Banana 2. It outputs 1K, 2K or 4K images in 14 aspect ratios and can use up to 14 reference images.
How much does Nano Banana 2.1 cost?+
Every Nano Banana 2.1 image costs $0.03, whether it is 1K, 2K or 4K. There is no subscription, and failed requests are free.
Nano Banana 2.1 vs Nano Banana 2: what changed?+
Google lists better visual quality, more accurate text, steadier characters in multi-turn edits, and clean wide images at 2K and 4K. Nano Banana 2.1 also lets you set the thinking level, but it has no 512px size. Google recommends Nano Banana 2.1 for new projects and plans to shut down Gemini 3.1 Flash Image on October 29, 2026.
Nano Banana 2.1 vs Nano Banana Pro: which should I use?+
In Google's own model card, Nano Banana 2.1 scores above Nano Banana Pro on every listed text-to-image and editing test, including infographics and multi-character consistency. Pick Nano Banana Pro only if you rely on its reference mix: up to five characters and three style references.
What is the model ID for Nano Banana 2.1?+
Google calls it Gemini Nano Banana 2.1, and the model ID is gemini-nano-banana-2.1. On SeedRouter you send that ID in the model field of the request body.
How do I get an API key for Nano Banana 2.1?+
Create a SeedRouter account, add credit, and create a key in the dashboard. The same key works for Nano Banana 2.1 and every other model here.
Can I run Nano Banana 2.1 locally?+
No. Nano Banana 2.1 is a closed Google model with no downloadable weights, so it runs through an API only.
Does Nano Banana 2.1 have a daily limit?+
There is no daily image quota on your SeedRouter balance. You can generate as long as you have credit; each request makes one image.
Generate your first Nano Banana 2.1 image
Try it in the Playground, then move the same request into your code.