Nano Banana Pro 2K API: High-Resolution Image Generation Compared

What is Nano Banana Pro 2K?

Nano Banana Pro 2K is an image generation model available on UniAll AI for producing higher-detail commercial visuals, posters, product images, ecommerce assets, and social media creatives.

The public model ID is `NanoBananaPro-2K`.

It supports two main workflows:

**Text-to-image**: generate an image from a prompt.
**Image-to-image**: use one reference image plus a prompt to guide the output.

Requests are processed asynchronously through the image generation endpoint.

Who should use Nano Banana Pro 2K?

Nano Banana Pro 2K is best for teams that need a balance between quality and cost:

Ecommerce teams creating product posters, main images, or promotional visuals.
Designers producing sharper brand visuals and campaign assets.
Developers building image generation into apps, CMS tools, or automation workflows.
Agencies that need repeatable API-based image generation for client projects.

If you only need quick drafts, the 1K variant may be enough. If you need larger output for premium print-like assets or extra-large creative work, the 4K variant may be a better fit.

Nano Banana Pro 2K vs 1K vs 4K

| Variant | Best for | Listed user price | |---|---|---:| | Nano Banana Pro 1K | Drafts, thumbnails, fast creative testing | $0.102 / image | | **Nano Banana Pro 2K** | Higher-quality posters, ecommerce visuals, commercial assets | **$0.102 / image** | | Nano Banana Pro 4K | Larger, more detailed outputs | $0.204 / image |

Nano Banana Pro 2K is the practical middle option: it keeps the same listed user price as 1K while targeting a sharper output tier. For workflows where visual clarity matters but 4K cost is not necessary, `NanoBananaPro-2K` is usually the strongest default choice.

API usage

Endpoint:

```http POST /v1/images/generations ```

The API is asynchronous and supports extra request body fields.

Text-to-image example

```json { "model": "NanoBananaPro-2K", "generation_mode": "text_to_image", "prompt": "A premium ecommerce product poster with clean studio lighting, sharp details, luxury packaging, minimal background.", "aspect_ratio": "1:1", "resolution": "2K", "num_images": 1 } ```

Image-to-image example

```json { "model": "NanoBananaPro-2K", "generation_mode": "image_to_image", "prompt": "Turn this reference into a polished commercial product poster with realistic lighting and refined composition.", "image_url": "https://example.com/reference.png", "aspect_ratio": "1:1", "resolution": "2K", "num_images": 1 } ```

Supported parameters

| Parameter | Required | Notes | |---|---:|---| | `model` | Yes | Use `NanoBananaPro-2K`. | | `generation_mode` | Yes | `text_to_image` or `image_to_image`. | | `prompt` | Yes | Main text instruction. | | `image_url` | Required for image-to-image | One reference image is supported. PNG, JPEG, and WebP are accepted. | | `aspect_ratio` | No | Supports `1:1`, `16:9`, `9:16`, `4:3`, `3:4`. Default is `1:1`. | | `resolution` | No | Supports `1K`, `2K`, and `4K`; use `2K` for this model variant. | | `num_images` | No | Generate 1 to 4 images per request. Default is 1. |

Pricing angle

For the listed user pricing on UniAll AI, Nano Banana Pro 2K is priced at **$0.102 per image**. The same listed user price is shown for 1K, while 4K is listed at **$0.204 per image**.

This makes 2K attractive for production workflows where quality matters, especially ecommerce images, posters, and brand visuals. Failed generations are refund-eligible according to the model configuration, while automatic retry is not enabled by default.

When to choose Nano Banana Pro 2K

Choose `NanoBananaPro-2K` when you need:

Sharper image quality than draft-level generation.
API-based text-to-image or image-to-image workflows.
A cost-efficient option before moving to 4K generation.
Consistent image generation for ecommerce, marketing, or design automation.

For teams comparing AI image APIs, Nano Banana Pro 2K is a good fit when the output needs to look polished but the workflow still needs predictable per-image pricing and simple API parameters.

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常见问题

What is the model ID for Nano Banana Pro 2K API?

The public model ID is `NanoBananaPro-2K`. Use it in the `model` field when calling the UniAll AI image generation endpoint.

Does Nano Banana Pro 2K support both text-to-image and image-to-image?

Yes. It supports `text_to_image` with a prompt and `image_to_image` with both a prompt and one reference image URL.

How much does Nano Banana Pro 2K cost?

The listed user price is $0.102 per image for Nano Banana Pro 2K. The 4K variant is listed at $0.204 per image, while 1K is also listed at $0.102 per image.