Create 4K Banners, Panoramas and Infographics with Nano Banana 2.1
Last verified: November 3, 2026
Nano Banana 2.1 is Google's high-efficiency model for generating and conversationally editing images. Its most useful upgrade is clean output in extreme formats. Google fixed the tiling artifacts on 1:4, 4:1, 1:8 and 8:1 frames at 2K and 4K, and it improved text rendering and infographic layout accuracy . That means you can generate a panoramic header, a tall banner or a scrolling infographic as one composition. Google introduced it on October 6, 2026 as an update to Nano Banana 2 (Gemini 3.1 Flash Image). It keeps Flash-level speed and is the more efficient counterpart to Gemini 3 Pro Image (Nano Banana Pro) . Google DeepMind's model card says it belongs to the Gemini 3 family and is based on Gemini 3.6 Flash .
Google also says the model improves visual quality, prompt adherence and character consistency across multiple turns. It can also blend several references into one scene (multi-image fusion) . Google's launch announcement highlights big gains in visual design, mask-based editing and subject consistency, aimed at more natural-looking images . In the editing tests on its model card, it ranks above both Nano Banana 2 and Nano Banana Pro for general editing and for editing with multiple references .
Know its limits upfront: Google says the model's advanced abilities are still limited in world knowledge, 3D reasoning and factual accuracy . You can use both of its modes, Text to image and Image to image, on this page.
Explore Nano Banana's Models
Output Specs and Input Limits
The controls, uploads and output you get with each run, by mode.
Generation modes
Text to image · Image to image
Resolution Quality
1K, 2K or 4K (starts at 1K)
Aspect Ratio range
14 fixed shapes from 1:8 to 8:1, including 21:9, plus Auto
Prompt length
Up to 20,000 characters
Reference uploads (Image to image)
1–10 images · JPG, JPEG, PNG, WEBP · up to 10 MB each · at least 300×300 px
Output per run
1 image
Six Checks Before You Generate
These checks for this model help you avoid blurry fine print, seams in panoramas and poses that won't change.
Raise Resolution Quality when the image has fine print
The model card says small text is often blurry at 1K . Resolution Quality starts at 1K, so switch to 2K or 4K before you generate anything with labels, menus, chart axes or footnotes.
Run 1:4, 4:1, 1:8 and 8:1 frames at 2K or 4K
Google's fix for tiling artifacts on these extreme ratios applies at 2K and 4K . When you pick one of these shapes, set Resolution Quality to 2K or 4K so the long frame renders at a size the fix covers.
Check which Aspect Ratio your mode starts on
Text to image starts on 1:1 and Image to image starts on Auto. If the image has to fit a specific slot, such as a 9:16 Story, a 4:5 feed post or a 21:9 hero, choose that shape yourself instead of keeping the default.
Keep text in the image to headlines and short labels
The model card lists long paragraphs and page-length text as weak spots . Put each line you want rendered in quotation marks and keep it short. Add body copy later in your layout tool.
Use no more than four recurring characters per image
Google says the model keeps up to 4 characters and up to 10 objects consistent when it combines references . When you upload several files in Image to image, say in the Prompt which image shows which person or product.
Describe the new pose when you edit a person
The model card notes rare cases where an edited subject keeps the pose from the input image . If you need a different stance, describe the pose and body position you want in the Prompt.
Nano Banana 2.1 or Seedream 5.0 Pro: Which Fits Your Next Image?
You can run both models on Vidofy in Text to image and Image to image. The first five rows show the controls and uploads each generator offers on Vidofy. The last two show what Google and ByteDance publish about the models themselves. Use them to match the tool to the frame shape, brief length and references your project needs.
| Feature/Spec | Nano Banana 2.1 | Seedream 5.0 Pro |
|---|---|---|
| Modes you can run | Text to image, Image to image | Text to image, Image to image |
| Prompt box limit | Up to 20,000 characters | Up to 2,048 characters |
| Aspect Ratio choices | Auto, 1:1, 2:3, 3:2, 3:4, 4:3, 4:5, 5:4, 9:16, 16:9, 21:9, 1:4, 4:1, 1:8, 8:1 (starts on 1:1 in Text to image, Auto in Image to image) | 1:1, 2:3, 3:2, 3:4, 4:3, 9:16, 16:9 (starts on 9:16) |
| Resolution Quality tiers | 1K, 2K, 4K (starts on 1K) | 1K, 2K (starts on 1K) |
| Image to image uploads | Upload Images: 1–10 JPG, JPEG, PNG or WEBP files, up to 10 MB each, at least 300×300 px | Add Image: 1–10 JPG, JPEG, PNG or WEBP files, up to 10 MB each, at least 300×300 px |
| Reference images the model can combine | Up to 14, keeping up to 4 characters and up to 10 objects consistent | Up to 10 |
| Weak spots its creator names | Small text (often blurry at 1K), long paragraphs and page-length text; rare cases where an edited subject keeps the input image's pose | Finer-grained text rendering and pixel-level editing consistency |
Match Each Generator to the Job
Unusual frames and large output
Nano Banana 2.1's Aspect Ratio menu goes beyond standard social and print shapes to very wide strips and very tall columns, and its Resolution Quality goes one tier higher. That matters for website hero bands, stage backdrops, sidebar ads and panoramic cover art. With other tools you would otherwise generate a standard frame and then crop or extend it elsewhere. Seedream 5.0 Pro's menu covers the everyday portrait, square and landscape shapes, which is enough when the image goes into a feed, a slide deck or a standard print size.
Brief length and dense layouts
Nano Banana 2.1's prompt box holds nearly ten times as much text, so you can paste a full creative brief in one go: section headings, data points, exact captions, color rules and composition notes. That helps with infographics and layouts with many elements, where every instruction matters. Seedream 5.0 Pro's smaller box works best with a condensed brief. Put the layout and the exact words to render first, and cut secondary styling notes first if you run out of room. Both creators aim their models at text-heavy design work, so here the practical difference is how much instruction each prompt can hold.
Text accuracy and editing quirks
Both creators say text rendering still has room to improve, so proofread every rendered word before publishing, whichever model you use. For Nano Banana 2.1, Google links blurry small type to 1K output, so choosing a higher Resolution Quality tier directly addresses it. For edits, Google mentions an occasional pose carried over from the input image, and ByteDance points to pixel-level editing consistency. With either model, compare the result with your reference before moving on.
Choose by Frame Shape, Output Size and Brief Length
Use this quick guidance to pick the best option for your workflow.
How to choose: Pick Nano Banana 2.1 when the job needs more than the standard shapes and sizes. Its Aspect Ratio menu adds Auto, 4:5, 5:4, 21:9 and the extreme 1:4, 4:1, 1:8 and 8:1 frames. Its Resolution Quality goes up to 4K instead of 2K, and its Prompt box holds 20,000 characters instead of 2,048. Otherwise the two match: both run Text to image and Image to image, both start at 1K, and both take 1–10 JPG, JPEG, PNG or WEBP uploads of up to 10 MB in Image to image. For a square, portrait or 16:9 image with a short brief, either generator will do the job.
Create Your First Image in Five Steps
Five steps take you from choosing a mode to a finished image.
Pick Nano Banana 2.1 in the model list
Choose Text to image to start from words alone, or Image to image to build on pictures you supply.
Add references with Upload Images
In Image to image, add one to ten photos or sketches for the result to build on. Text to image skips this step.
Write your Prompt, then try Enhance Prompt
Describe the subject, layout and any exact words that should appear in the image. Enhance Prompt, under the box, suggests fuller versions of a rough idea. Your text only changes if you pick one.
Set Aspect Ratio and Resolution Quality
Match Aspect Ratio to where the image will be used, or leave it on Auto. Then choose 1K, 2K or 4K under Resolution Quality.
Click Generate
Each run returns one new image. To refine it, adjust the prompt or settings and generate again.