AIREITER
Nano Banana 2.1 AI Image Generator and API
Nano Banana 2.1 is Google's latest fast image generation and editing model, an update to Nano Banana 2. It keeps Flash-level speed while improving visual quality, prompt adherence, character consistency, and text rendering, with output at 1K, 2K, or 4K.
Better image quality at every tier
Realism, lighting, and fine detail improve across 1K, 2K, and 4K output compared with Nano Banana 2. Wide compositions at 2K and 4K render as one clean image without visible seams.
Legible text inside the image
Headlines, signage, menus, labels, and infographic layouts come out readable and correctly spelled far more often, which makes the model practical for posters, thumbnails, and marketing creative.
Consistent characters and products
Upload up to 10 reference images and the model keeps faces, outfits, products, and logos recognizable across new scenes, which is what multi-shot campaigns and storyboards need.
Fast enough to iterate
Most images finish in roughly 15 to 35 seconds, so you can try several prompt variations in the time a heavier model takes to return one.
What to Create with Nano Banana 2.1
Posters, banners, and thumbnails
Describe the layout and the exact headline. The improved text rendering lets you ship social creative and ad variants with copy already in place.
Product photography and mockups
Upload product shots and place them into new settings, lighting, and seasonal themes while the packaging and logo stay intact.
Character-consistent series
Reuse the same character reference images across a storyboard, comic, or campaign so every frame shows the same person or mascot.
Conversational photo editing
Change the background, weather, style, or time of day of an existing photo with a plain-language instruction while the composition stays the same.
Supported Nano Banana 2.1 Controls
The playground and the API expose the same parameters.
Prompt
Describe the subject, setting, lighting, framing, and any text that should appear. When reference images are attached, describe what to keep and what to change.
Reference images
Optional, up to 10 images in PNG, JPEG, or WebP. With no reference image the request is text-to-image; with one or more it becomes image-to-image editing or multi-reference composition. Mask-based inpainting is not supported.
Aspect ratios
Auto, 1:1, 3:2, 2:3, 4:3, 3:4, 5:4, 4:5, 16:9, 9:16, and 21:9. Auto lets the model pick a ratio that suits the prompt or the reference image.
Resolution
1K, 2K, or 4K. The default is 1K. Each request returns one image.
Nano Banana 2.1 Pricing
Priced by resolution
Each image is billed by its output tier: 1K, 2K, or 4K. The exact credit cost of every tier is shown in the pricing table above and on the Generate button.
No surcharge for references or ratio
Attaching reference images or choosing a different aspect ratio does not change the price.
How credits are computed
The submit endpoint returns the estimated credit cost before the task runs, and the query endpoint returns the final credits_used after completion.
Failed tasks are free
If a generation fails, no credits are charged.
Generate with Nano Banana 2.1
Four steps from idea to finished image, in the browser or through the API.
Write the prompt
Describe the scene and spell out any text that should appear in the image, in quotes.
Add reference images (optional)
Upload up to 10 images of the characters, products, or styles to keep, or skip this step for pure text-to-image.
Pick ratio and resolution
Choose an aspect ratio, or leave it on auto, and pick 1K for drafts or 2K and 4K for final assets.
Generate and refine
Review the result and adjust the prompt or swap a reference image. Feed a good output back in as a reference to keep iterating on it.
Use Nano Banana 2.1 through the AIReiter API
Submit one normalized task and query the same external task ID until it reaches a terminal state.
Model ID
Send nano_banana_v2_1 as the model value in the request body.
Submit a task
POST /api/openapi/submit with the model, params (prompt, optional image_url array, aspect_ratio, resolution), and a unique out_task_id. The response returns the estimated credit cost.
Query the result
POST /api/openapi/query with the same out_task_id until the status is completed or failed. Completed responses include the image URL and the final credits_used.
Store results on your side
Download the output image and keep it in your own storage instead of hot-linking the result URL long term.
Related AI Image Models on AIReiter
Nano Banana 2
The previous fast Nano Banana model. Nano Banana 2.1 replaces it as the default choice for speed-sensitive generation and editing.
Nano Banana Pro
The professional-tier Nano Banana model. Choose it for complex, high-stakes compositions where per-image quality matters more than speed.
GPT-Image 2
A general-purpose image model with custom pixel sizes and mask-based editing. Choose it when you need inpainting or an exact canvas size.
Nano Banana 2.1 FAQ
Answers about capabilities, controls, pricing, and API usage.
/ 01What is Nano Banana 2.1?
Nano Banana 2.1 is Google's fast image generation and editing model, released in October 2026 as an update to Nano Banana 2. It improves image quality, prompt adherence, text rendering, and multi-image consistency while staying fast enough for iterative work.
/ 02How is it different from Nano Banana 2?
Images look more realistic, text inside the image is more accurate, characters and products stay more consistent across references, and wide compositions at 2K and 4K no longer show seams. Nano Banana 2.1 does not offer the smaller 512px tier.
/ 03Should I use Nano Banana 2.1 or Nano Banana Pro?
Use Nano Banana 2.1 for fast, high-volume generation and editing. Use Nano Banana Pro when you want the most polished result on a complex composition and turnaround time matters less.
/ 04How many reference images can I upload?
Up to 10 per request, in PNG, JPEG, or WebP. They are used in the order you upload them.
/ 05Which aspect ratios and resolutions are supported?
Auto plus 1:1, 3:2, 2:3, 4:3, 3:4, 5:4, 4:5, 16:9, 9:16, and 21:9, at 1K, 2K, or 4K output.
/ 06Does it support masks or inpainting?
No. Edits are driven by the prompt and the reference images. For mask-based inpainting, use GPT-Image 2 on AIReiter.
/ 07How is Nano Banana 2.1 priced?
Per generated image, by resolution tier. Reference images and aspect ratio do not change the price, and failed tasks are not charged. See the pricing table on this page for current credits.
/ 08Which API model ID should I use?
Use nano_banana_v2_1 with POST /api/openapi/submit, then poll POST /api/openapi/query with the same out_task_id.