Nano Banana 2 4K API overview
Nano Banana 2 4K is a high-resolution image generation model available on UniAll AI for production-grade visual workflows. It supports both text-to-image and image-to-image generation, making it useful for teams that need detailed creative assets, ecommerce visuals, product posters, social media graphics, brand concepts, and reference-guided image creation.
The public model id is `NanoBanana2-4K`.
Who should use it
Nano Banana 2 4K is best suited for:
- Ecommerce teams creating product images, hero banners, and promotional posters
- Designers producing high-detail marketing visuals
- Developers building image generation features into apps or internal tools
- Agencies and platform operators that need API-based image workflows
- Teams that need selectable output resolutions up to 4K
Supported generation modes
UniAll AI exposes Nano Banana 2 4K through an async image generation API.
Supported modes:
- `text_to_image`: generate images from a prompt
- `image_to_image`: generate from a prompt plus one reference image URL
Supported core parameters include:
- `prompt` — required text instruction
- `image_url` — optional reference image for image-to-image mode
- `aspect_ratio` — `1:1`, `16:9`, `9:16`, `4:3`, or `3:4`
- `resolution` — `0.5K`, `1K`, `2K`, or `4K`
- `num_images` — 1 to 4 images per request
API usage
Endpoint:
```http POST /v1/images/generations ```
Example request:
```json { "model": "NanoBanana2-4K", "generation_mode": "image_to_image", "prompt": "A premium product poster with clean lighting and sharp details.", "image_url": "https://example.com/reference.png", "aspect_ratio": "1:1", "resolution": "4K", "num_images": 1 } ```
For pure text-to-image generation, omit `image_url` and set `generation_mode` to `text_to_image`.
Pricing
Nano Banana 2 4K uses per-image billing with resolution-based pricing on UniAll AI.
| Resolution | User price | |---|---:| | 0.5K | $0.0408 / image | | 1K | $0.0544 / image | | 2K | $0.0816 / image | | 4K | $0.1088 / image |
The current listed 4K user price is approximately **$0.109 per image**. API and partner profiles may have different rates depending on the access plan. Failed generations are eligible for refund handling when supported by the platform configuration.
Practical pricing guidance
Use 0.5K or 1K for drafts, prompt testing, and batch exploration. Move to 2K or 4K when generating final assets for ecommerce pages, campaign posters, or delivery-ready creative work. This keeps iteration costs lower while preserving high-resolution output for approved concepts.
常见问题
What is the model id for Nano Banana 2 4K on UniAll AI?
The public model id is `NanoBanana2-4K`. Use this value in the `model` field when calling the image generation API.
How much does Nano Banana 2 4K cost?
The listed user price for 4K output is $0.1088 per image, shown as about $0.109 per image. Lower resolution tiers are also available: 0.5K, 1K, and 2K.
Does Nano Banana 2 4K support image-to-image generation?
Yes. It supports `image_to_image` with a prompt and one reference image URL. It also supports `text_to_image` generation from a prompt alone.
官方入口
站内推荐路径
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