Nano Banana 2 Economy

google/gemini-3-1-flash-image-economy
EconomyImage-to-ImageText-to-Image

Nano Banana 2 Economy offers an ultra-low-cost deployment channel for the Nano Banana 2 image generation model architecture. Engineered for scalable visual content workflows, it delivers sharp photorealistic textures, dynamic style adaptation, and precise prompt obedience across resolution tiers up to 4K at a flat cost per output. While retaining the core image synthesis capabilities of Nano Banana 2, this Economy channel operates with dynamic concurrency management and standard execution priority compared to the Official channel. It stands as an optimal choice for high-volume graphic design, social media content scaling, and automated design batching where unit cost efficiency is paramount.

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Nano Banana 2 Economy API

Nano Banana 2 Economy is an image editing and generation model based on Google's Gemini 3.1 Flash Image, provided as a cost-effective channel on the iCreat platform. It supports image-to-image generation, text-to-image generation, up to 11 reference images (up to 6 high-fidelity object images and 5 portrait photos), 1K/2K/4K resolution tiers, and 10 aspect ratios. Notice: The model has economy is means this model is not stable and just pricing is lower than the official, if you run the project for stable service we suggest you using the official channel as first option and economy as the alternative retry channels.

On the iCreat platform, the model uses an asynchronous two-step API mode (submit task → poll for result). The submission endpoint is https://api.icreat.ai/v1/task/submit/google/gemini-3-1-flash-image-economy, and the task result endpoint is https://api.icreat.ai/v1/task/result. Authentication uses Authorization: Bearer ${ICREAT_API_KEY}. Pricing is $0.03 per generated image.

Model Positioning

Nano Banana 2 Economy is a cost-effective channel provided exclusively by the iCreat platform, based on Google's Gemini 3.1 Flash Image foundation model. It is tailored for developers and creators who need high-quality image editing and generation at a lower cost. Because availability is less stable than the official channel, it is best used as an alternative retry channel for production environments, with the official channel as the primary choice.

Core Capabilities

Image Editing and Generation

The model supports both image-to-image and text-to-image workflows. When the image field is provided and non-empty, the model operates in image-to-image mode, using the reference images to guide the edit or generation.

Multi-Reference Image Input

It accepts up to 11 reference images, including up to 6 high-fidelity object images and up to 5 portrait photos, enabling complex compositional and subject-driven generation.

1K / 2K / 4K Resolution Tiers

The image_size parameter supports three resolution tiers — 1K, 2K, and 4K — allowing users to balance output quality and cost.

10 Aspect Ratios

The aspect_ratio parameter supports 10 options: 1:1, 2:3, 3:2, 3:4, 4:3, 4:5, 5:4, 9:16, 16:9, and 21:9. If not specified, it defaults to the aspect ratio of the first uploaded reference image.

Pricing

Generated Image Count Unit Price (USD/Image)
1 $0.03

Note: Billing is based on the number of generated images. USD only; no CNY.

Application Scenarios

  • E-commerce product image editing and background replacement
  • Portrait photo stylization and retouching
  • Marketing creative material generation
  • High-resolution (4K) output for print or display
  • Batch image generation as a cost-effective retry channel

Model Comparison

Comparison Table 1: Nano Banana 2 Economy vs Nano Banana Pro Economy

Model Base Model Price Resolution Tiers Reference Images Aspect Ratios
Nano Banana 2 Economy (this model) Gemini 3.1 Flash Image $0.03/image 1K / 2K / 4K 11 (6 object + 5 portrait) 10
Nano Banana Pro Economy Gemini 3.0 Pro Image $0.04/image 1K / 2K / 4K 11 10

Note: Nano Banana 2 Economy is priced lower ($0.03 vs $0.04) and is based on the newer Gemini 3.1 Flash Image foundation.

Comparison Table 2: Same-Tier Image Generation Model Comparison

Model Developer Price Max Output Reference Images
Nano Banana 2 Economy Google $0.03/image 4K 11
Seedream 5.0 Pro ByteDance $0.09/image 2K (7 sizes) 10
GPT Image 2 OpenAI >$0.03/image - -

Note: Nano Banana 2 Economy is approximately 67% cheaper than Seedream 5.0 Pro and supports 4K output.

Why Choose Nano Banana 2 Economy?

  • Lower cost: $0.03 per image, lower than Nano Banana Pro Economy ($0.04) and same-tier models like Seedream 5.0 Pro ($0.09)
  • Based on Google's newer Gemini 3.1 Flash Image foundation
  • Supports up to 11 reference images (6 object + 5 portrait) for complex compositions
  • 1K / 2K / 4K resolution tiers and 10 aspect ratios for flexible output
  • Serves as a cost-effective retry channel alongside the official channel

Specifications

Field Value
Model Name Nano Banana 2 Economy
Developer Google
Model ID google/gemini-3-1-flash-image-economy
Model Type Image Editing and Generation Model
Endpoint https://api.icreat.ai/v1/task/submit/google/gemini-3-1-flash-image-economy
Task Result Endpoint https://api.icreat.ai/v1/task/result
Authentication Authorization: Bearer ${ICREAT_API_KEY}
Input Modalities Text, Image
Output Modalities Image
Resolution Tiers 1K / 2K / 4K
Aspect Ratios 1:1, 2:3, 3:2, 3:4, 4:3, 4:5, 5:4, 9:16, 16:9, 21:9
Reference Image Limit Up to 11 images
Reference Image Restrictions Up to 6 high-fidelity object images, up to 5 portrait photos; png/jpg/jpeg/webp
Prompt Limit Up to 8192 characters
Billing Unit Per generated image (USD)
API Mode Asynchronous two-step (submit → poll)

Architecture

Nano Banana 2 Economy uses an asynchronous two-step API architecture. The client submits a task to the endpoint with a flat top-level request body containing prompt, image (optional), aspect_ratio, and image_size. The platform returns a task_id. The client then polls the task result endpoint https://api.icreat.ai/v1/task/result with the same task_id until the status becomes SUCCEEDED or FAILED. While processing, the result field is an empty array []. On success, result contains image resources (type Image) with url and download_url, and costUSD is returned.

Notes

  • Both steps use the same task_id. While processing, result is [] and you should continue polling.
  • FAILED is a terminal state; check your request parameters or reference media.
  • The request body uses flat top-level fields and does not wrap parameters in input or parameters.
  • The prompt field accepts up to 8192 characters.
  • Reference images are limited to 11 total: up to 6 high-fidelity object images and up to 5 portrait photos. Supported formats are png, jpg, jpeg, and webp.
  • The aspect_ratio parameter has 10 valid values; if not specified, it defaults to the aspect ratio of the first uploaded reference image.
  • The image_size parameter supports three tiers: 1K, 2K, and 4K.
  • costUSD is only returned when the task succeeds.
  • The Economy channel is a cost-effective channel provided exclusively by the iCreat platform. Its availability is less stable than the official channel. For production environments, prefer the official channel and use the Economy channel as an alternative retry option.

Frequently Asked Questions

How do I call Nano Banana 2 Economy?

Use the asynchronous two-step flow. Submit the task to https://api.icreat.ai/v1/task/submit/google/gemini-3-1-flash-image-economy with Bearer authentication and flat top-level fields. Then poll https://api.icreat.ai/v1/task/result with the returned task_id until the status is SUCCEEDED or FAILED.

How is the cost calculated?

Billing is $0.03 per generated image, based on the number of images generated. For example, generating 2 images costs $0.06. The costUSD field is returned only when the task succeeds.

What are the reference image limits?

You can provide up to 11 reference images: up to 6 high-fidelity object images and up to 5 portrait photos. Supported formats are png, jpg, jpeg, and webp. If the image field is non-empty, the model operates in image-to-image mode.

What resolutions and aspect ratios are supported?

The image_size parameter supports three tiers: 1K, 2K, and 4K. The aspect_ratio parameter supports 10 options: 1:1, 2:3, 3:2, 3:4, 4:3, 4:5, 5:4, 9:16, 16:9, and 21:9. If aspect_ratio is not specified, it defaults to the aspect ratio of the first uploaded reference image.

What is the difference between the Economy channel and the official channel?

The Economy channel is a cost-effective channel provided exclusively by the iCreat platform. Its price is lower than the official pricing, but its availability is less stable than the official channel. For production environments, we recommend using the official channel first and the Economy channel as an alternative retry option.

What is the difference between Nano Banana 2 Economy and Nano Banana Pro Economy?

Nano Banana 2 Economy is priced lower ($0.03 vs $0.04 per image) and is based on the newer Gemini 3.1 Flash Image foundation. Other capabilities, including resolution tiers, reference image limits, and aspect ratios, are the same.