Using Nano Banana Pro (Gemini 3 Pro Image) on OpenRouter

Implementation guide · Gemini 3 · Google DeepMind

Serverless

OpenRouter exposes Nano Banana Pro (Gemini 3 Pro Image) through model ID google/gemini-3-pro-image. Use the setup steps, sourced pricing, capabilities, and official provider links below to validate this route before deployment.

Last refreshed 2026-06-15. Next refresh: weekly.

Quick Start

1
Create an account at OpenRouter and generate an API key.
2
Use the OpenRouter SDK or REST API to call google/gemini-3-pro-image — see the documentation for request format.
3
You'll be billed $2.00/1M input, $12.00/1M output tokens. See full pricing.

API Portal Documentation Pricing Model Card

Code Examples

See OpenRouter documentation for integration details.

Pricing on OpenRouter

Type	Price (per 1M)
Input tokens	$2.00
Output tokens	$12.00

Capabilities

VisionMultimodalReasoningJSON / Tool useStructured OutputsBatch API

About Nano Banana Pro (Gemini 3 Pro Image)

Nano Banana Pro is the GA Gemini 3 Pro Image model for high-fidelity image creation through the Gemini API. It is aimed at complex graphic design, product mockups, data visualizations, and accurate text rendering, and replaces gemini-3-pro-image-preview retiring on 2026-06-25.

Full model details →

Model Specs

Released2026-05-28

Context66k

ArchitectureDecoder Only

Knowledge cutoff2025-01

OpenRouter, Inc.

New York, NY, USA