Image Model

Nano Banana 2.1 for Architecture and Interior Design

Nano Banana 2.1 is Google's image generation and editing model, built on Gemini 3.6 Flash as the update to Nano Banana 2. In Fenestra it renders and edits architecture and interiors in Create and Edit, with readable lettering and the same building held across edits, at up to 4K.

The sandstone and glass building between Victorian tenements on an overcast day
The same view after fresh snow, roofs and trees white and the sun breaking through, building, street and camera unchanged

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What's New

What's New in Nano Banana 2.1?

Readable text, steadier edits and nearly three times Nano Banana 2's infographic accuracy on Google's model card. Here's how that showed up in our first renders.

Text that reads

We asked for 'Fenestra HQ' carved into a sandstone arch and got it spelled right, with the lettering following the curve of the stone.

Same building, any weather

We took one Glasgow street from overcast to early-morning sun to fresh snow. The arches, the window grid and the camera stayed put each time.

Plain prompts work

None of our prompts ran past two sentences. Name the building, the setting and the camera angle, and it fills in the rest.

Diagrams and boards

Google's model card puts 2.1 at nearly three times Nano Banana 2 on infographic accuracy. That's the gain we expect to matter most for labelled boards and concept diagrams.

Workflow

How Do You Use Nano Banana 2.1?

Upload a view, pick Nano Banana 2.1 in Create or Edit, describe the change and what should stay, then choose 1K, 2K or 4K. Nothing to install.

Step 1

Upload the view

A render, a viewport screenshot, a photograph or a sketch. JPG or PNG.

Step 2

Pick Nano Banana 2.1

From the model list in Create or Edit. Add up to six reference images alongside the view.

Step 3

Say what changes, and what stays

Describe the edit and the parts to keep. Google's model card flags left-and-right mix-ups, so call elements by name, and put any words you want in the image in quotes.

Step 4

Download at the size you need

1K to explore, 2K for client review, 4K for the final board.

Model Facts

Nano Banana 2.1 Specs at a Glance

Resolution, inputs and release details, and what you get back from it in Fenestra.

Close detail of a sandstone window frame with snow on the sill and rain on the glass, rendered by Nano Banana 2.1

Up to 4K

Pick 4K for the final board, no upscaler in the chain

Google DeepMind

The team behind Nano Banana, Nano Banana 2 and Nano Banana Pro

6 October 2026

Released by Google, and in Fenestra the same week

1K · 2K · 4K

Pick the output resolution per generation

7 images

Your view plus up to six references in one generation

Close elevation of the arched sandstone entrance and glazing with snow on the sills, rendered by Nano Banana 2.1

Create + Edit

Text-to-image and image editing in one model

Nearly 3x

Nano Banana 2's infographic accuracy, on Google's own test

Commercial rights

Included on every paid plan

Edits

What Is Nano Banana 2.1 Good For?

On architecture and interior work, these are the edits we'd use it for.

Signage and wayfinding

Labelled boards

Weather and time of day

Furniture from references

Material swap

Sketch to render

Prompts

Which Nano Banana 2.1 Prompts Work for Architecture?

Short, plain ones: name the building, the setting and the camera angle. Here are three stills and a video from our first session, with the exact prompt behind each.

01Create

A street from a text prompt

modern arched stone and asymmetric window 8 story building, large windows in central Glasgow, dark atmospheric alongside stunning tenements, leafy green surrounding. Elevation Camera Angle 200mm architecture photograph

02Edit

Early morning, same building

change the environment to early morning, long shadows, sun coming out from the clouds, fog in the distance

03Create

Lettering carved in stone

street view, person walking passed motion blurred, detailed, ornate arched stone entryway above carved into the stone reading 'Fenestra HQ'. Elevation Camera Angle two point perspective

Ten-second whip zoom from above the block down to the lettered entrance
04Image to video

Whip zoom to the front door

whip zoom to close up camera view of the project with a man walking passed, motion blurred

Nano Banana 2.1 Examples

Our examples on one shared Crit Space board. Pan and zoom the way a client would.

What design teams say about Fenestra

More than 200,000 renders have been generated in Fenestra. Here is how practices use it on client work.

“Great tool for initial concepts. We provide new house and land packages and use Fenestra to update external colour scheme facade renders and floor plans for marketing purposes. Fenestra is a quick way to provide the images to clients to visualise their new home.
Michelle Morrison
Designer · Urbane Homes
Urbane Homes
“Fenestra is a great tool and works really well for us. We’re using it to help establish a new internal standard for visualisation across the office, making it easier for high-quality visuals to become part of our standard project package.
Bjørn Polzin
Head of Planning · apoprojekt
apoprojekt
“What sets Fenestra apart is the people behind it. The team is always available, genuinely listens to user needs, and provides a level of support that is responsive, approachable, and highly professional.
Raquel González
Real Estate Marketing Department · VAPF
VAPF

Plans & Pricing

Individual

Perfect for students & solo designers

$16
$8/ mo
Billed yearly ($96/year)saving 20%
200 Credits / month· 4¢ each
  1. ~200 Renders /Month
  2. ~20 Videos /Month
  3. AI Enhanced Prompting
  4. Commercial Use
Popular

Pro

Perfect for Professionals

$56
$28/ mo
Billed yearly ($336/year)saving 20%
1000 Credits / month· 2.8¢ each

30% cheaper per credit than Individual

Private by default · We don't train on your data
  1. ~1000 Renders /Month
  2. ~100 Videos /Month
  3. ~500 Enhanced Renders /Month
  4. 5x Credits
  5. Commercial Use
  6. Image Editing
  7. Fast Support
  8. Fast Rendering
  9. Unlimited Projects
  10. Share 3D
  11. Team Tools (Coming Soon)

Studio

For professionals and studios creating at scale

$96
$48/ mo
Billed yearly ($576/year)saving 20%
2k4k6k8k
2000 Credits / month· 2.4¢ each

40% cheaper per credit than Individual

Private by default · We don't train on your data
  1. ~2000 Renders /Month
  2. ~200 Videos /Month
  3. ~1000 Enhanced Renders /Month
  4. Commercial Use
  5. Professional Image Editing
  6. Priority Render Speeds
  7. Priority Support
  8. Priority Feature Access
  9. Unlimited Projects
  10. Share 3D
  11. Team Tools (Coming Soon)

For Teams & Enterprises

One shared credit pool, shared projects, and centralised billing

Team

Perfect for small teams

$416.67
$208.33/ mo
Billed yearly ($2500/year)saving 20%
5k10k
5000 Credits / month· 4.2¢ each
Private by default · We don't train on your data
  1. up to 5 Seats
  2. 5000 Credits
  3. Shared Credit Pool

Enterprise

Custom solutions with dedicated support and admin features for scale

Let's Chat
  1. Flexible multi-user licensing
  2. Shared Credit Pools
  3. Centralized team admin & billing
  4. Personalized onboarding & support
  5. Shared AI model access

Nano Banana 2.1 FAQs

What you'll want to know before putting Nano Banana 2.1 on a client job.

Nano Banana 2.1 is Google's image generation and editing model, released on 6 October 2026 as an update to Nano Banana 2 and built on Gemini 3.6 Flash. We added it to Fenestra's Create and Edit the same week, at 1K, 2K and 4K.
Nano Banana 2.1 is better at text, at staying consistent across edits and at infographics. Google's model card scores it ahead of Nano Banana 2 on overall preference and consistency, and infographic accuracy nearly triples. In our first renders, text and consistency were the standouts. Both are in Fenestra with the same 1K, 2K and 4K options.
Open a project, choose Create or Edit, and pick Nano Banana 2.1. Describe the change and what should stay the same, add up to six reference images and refer to them by number, then set the resolution. Put any words you want in the image in quotes and keep labels short, since Google's model card notes small text is a weak spot. Call elements by name rather than left or right, because the same card flags left-right mix-ups.
There's no official comparison yet, and we're not calling it. Both are in Fenestra: Nano Banana 2.1 in Create and Edit, GPT Image 2.5 in Edit as Flare and Sunburst. We'd start with 2.1 for readable lettering and a run of edits on one view, and run the same prompt through both before committing.
Yes. Everything you generate on a paid plan comes with full commercial rights, covering client presentations, competition submissions, your website and social channels.
It depends on the shot, and there's no official comparison yet: Google hasn't published a head-to-head with Nano Banana Pro. So far we'd reach for 2.1 when the image needs readable text, a labelled board, or a run of edits on the same view. Run the same prompt through both from the model picker and compare.
It's included on every Fenestra plan and uses credits like our other models. The cost scales with resolution, so 1K explorations are cheap and 4K costs the most, and the exact figure is on the generate button before you run it.
Yes, especially for readable lettering and for keeping one building consistent across a run of edits. We asked for 'Fenestra HQ' carved into a sandstone arch and got the lettering spelled right and following the curve, from a two-sentence prompt. It also held our Glasgow building steady through overcast, morning sun and snow, so you can show a client the scheme in another season without it drifting.
A JPG or PNG view as the base image, plus up to six more images as references: renders, photographs, material samples, product shots or a mood board. One reference can be a board of several pieces, so a whole furniture selection counts as one image.

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