English
image_generate.gemini_3_pro_image_t2i
google/nano-banana-pro/text-to-image
text-to-image

The Nano Banana Pro API generates images (Gemini 3 Pro Image) from natural-language prompts — photo-real lighting, accurate in-image typography, native 1K/2K/4K output, 10 aspect ratios, PNG/JPEG/WebP — all through one REST endpoint, priced 5% below Google's published Nano Banana Pro API rate.

Input
The text prompt sent to the model
Output
Sample edited image — run the model to replace this previewSampleRun the model to replace this preview

Nano Banana Pro API: Text to Image

Use the Nano Banana Pro API to generate images from natural-language prompts.

The Nano Banana Pro API generates images (Gemini 3 Pro Image) from natural-language prompts. Photo-real lighting, accurate in-image typography, native 1K/2K/4K output, 10 aspect ratios, PNG/JPEG/WebP output — all through one REST endpoint.

Pricing on the Nano Banana Pro API is 5% below Google's published rate — $0.127 at 1K and 2K, $0.228 at 4K. The Nano Banana Pro API uses one RouterBase key — no provider-specific SDKs.

Why this model

Six reasons teams ship on the Nano Banana Pro API

From flagship Gemini 3 Pro fidelity to 5% off official pricing — what the Nano Banana Pro API gets right.

Natural-language generation

Describe the image; the Nano Banana Pro API renders it with photo-real lighting and accurate in-image typography.

Accurate in-image typography

The Nano Banana Pro API reliably renders readable text inside the image — logos, signage, and overlays land at production quality.

Native 1K / 2K / 4K output

Pick per-call. Sample at 1K, finalise at 4K — the Nano Banana Pro API switches resolution without reshaping the prompt.

5% off official

Pay 5% less than Google's published rate; the Nano Banana Pro API is flat across resolutions.

REST + JSON

One endpoint, one key, no SDK lock-in. Plain JSON in, signed URL out.

Per-call format switching

Resolution, aspect ratio, and output format (PNG / JPEG / WebP) are per-request on the Nano Banana Pro API — no code change needed.

RouterBase dashboard preview
Quickstart

Get started with the Nano Banana Pro API in 3 steps

From sign-up to your first Nano Banana Pro API call in under 5 minutes.

  1. Create a RouterBase API key

    Sign up and generate sk-rb-… — one key works for the Nano Banana Pro API and 200+ other models.

  2. POST to the Nano Banana Pro API

    Send a prompt in JSON. The Nano Banana Pro API returns a signed URL within seconds.

  3. Inspect the result

    Each Nano Banana Pro API response includes generation metadata for auditing and a render URL ready to embed.

Get API Key Read docs
Pricing

Pay only for what you use

RouterBase passes through partner-tier pricing. Compared against the model's official published API rate.

ResolutionRouterBaseOfficialSave
1K $0.114$0.134−15%
2K $0.114$0.134−15%
4K $0.204$0.240−15%

Your request will cost $0.114 per run (1K).With $1 you can run this model approximately 8 times.

Customer stories

What teams build with the Nano Banana Pro API

Real production loads running on the Nano Banana Pro API and the RouterBase model catalog.

Marcus Reyes
Marcus ReyesCTO, Paradigm AI

We swapped a multi-step storyboard pipeline for the Nano Banana Pro API. Hero shots land in seconds with photo-real lighting we used to retouch by hand.

Priya Lakshmi
Priya LakshmiFounder, Quillo

We swapped three providers through RouterBase in one line of code when OpenAI had its outage. Our users never noticed.

Thomas Beck
Thomas BeckStaff Engineer, Northbeam

In-image typography on the Nano Banana Pro API is the difference between a mock and a print-ready ad. We stopped sending hero shots back to design.

Aoi Tanaka
Aoi TanakaML Lead, Daybreak Robotics

Generated 4K reference plates with the Nano Banana Pro API and dropped a manual cleanup step from our render pipeline.

Jonas Keller
Jonas KellerIndie Developer

Plugged the Nano Banana Pro API into my existing OpenAI SDK with one base URL swap — less work than writing this testimonial.

Ethan Nguyen
Ethan NguyenHead of Engineering, Compound Studio

RouterBase puts 200+ models behind one key. Our research team stopped asking for new provider accounts.

Sophia Martín
Sophia MartínCTO, Relay

The Nano Banana Pro API renders 4K hero banners with brand typography baked in — fewer manual revisions, fewer round-trips with design.

Lucas Fernandes
Lucas FernandesEngineering Manager, Light

We migrated 42 services to RouterBase over a weekend. The only PR comment we got was 'wait, that's all?'.

David Okonkwo
David OkonkwoCo-founder, Figment

Pricing on the Nano Banana Pro API is 5% below Google's published rate — at our scale that's six figures saved per quarter.

Frequently Asked Questions

Common questions about the Nano Banana Pro API.

The Nano Banana Pro API is RouterBase's pass-through to Google Nano Banana Pro (Gemini 3 Pro Image). It generates images from natural-language prompts at 1K, 2K, and 4K, with photo-real lighting, accurate in-image typography, and PNG/JPEG/WebP output.