# MiniMax H3 Image

MiniMax's open-weight image model with output up to 4K, and edits guided by up to 16 references.

Last updated: 2026-11-11

**Key facts**

- MiniMax H3 Image is MiniMax's open-weight image model, with a Highspeed tier that takes the same inputs and limits.
- MiniMax H3 Image renders 1K, 2K or 4K in Sloosh; 2K is the default.
- MiniMax H3 Image takes up to 16 reference images in Sloosh Studio and prompts up to 32,000 characters.
- MiniMax H3 Image has no seed and no transparent background.

Web page: https://sloosh.ai/docs/minimax-h3-image

MiniMax H3 Image is MiniMax's image model, with open weights. It makes 1K, 2K or 4K images from a prompt or edits them from up to 16 reference images. MiniMax H3 Image Highspeed is MiniMax's Highspeed tier, with the same inputs and limits at a higher price; the Generate button shows it.

## When to use it

- Realistic photos that need to hold up big: product shots, lifestyle scenes and portraits at 4K.
- Edits that combine several inputs, such as a product, a model and a setting, since it reads up to 16 references in one run.
- Wide or tall layouts, from 21:9 banners to 9:21 phone screens.

## How to prompt it

- Write a detailed description in English. MiniMax recommends detailed English prompts. MiniMax's API can also enhance a prompt before it renders.
- Name references by their order: Image 1, Image 2 and so on, as they sit in the tray.
- Say what must stay the same in an edit, then the one thing that changes.
- Describe what you want to see. The model takes no negative prompt, so "no text" works better as "a plain wall with nothing written on it".

## Example

**Prompt**

```text
A close-up product photo of a brushed steel wristwatch with a deep green dial, lying on a slab of dark grey slate. Soft window light from the left, a thin reflection along the bezel, fine scratches visible on the slate. Shallow depth of field, the strap fading out of focus at the back. Horizontal 16:9 frame for a website banner, empty slate on the right for copy.
```

## Settings in Sloosh

- Resolution: 1K, 2K or 4K.
- 2K is the default.
- Aspect ratio: 1:1, 16:9, 9:16, 4:3, 3:4, 3:2, 2:3, 4:5, 5:4, 21:9 or 9:21.
- References: up to 16 images.
- Prompt: up to 32,000 characters.
- No seed and no transparent background.

Open it in [Image](https://sloosh.ai/studio/image) and pick MiniMax H3 Image or MiniMax H3 Image Highspeed in the model chip. The Generate button shows the cost first.

## Frequently asked questions

### What is MiniMax H3 Image best for?

MiniMax H3 Image is best for realistic images that need a lot of detail, and for edits that combine several references. In Sloosh it renders up to 4K and reads up to 16 reference images in one generation.

### Can MiniMax H3 Image edit a photo?

Yes. Add the photo as a reference, say what changes and what must stay the same. MiniMax H3 Image takes up to 16 references in Sloosh Studio, numbered in the order you add them.

### What is the difference between MiniMax H3 Image and Highspeed?

[Highspeed](https://sloosh.ai/models/minimax-h3-image-highspeed) is MiniMax's Highspeed tier of [MiniMax H3 Image](https://sloosh.ai/models/minimax-h3-image), with the same inputs and limits at a higher price; the Generate button shows it.

### Can MiniMax H3 Image make a transparent background?

No. For a transparent PNG in Sloosh, use [GPT Image 2.6 Sunburst](https://sloosh.ai/models/gpt-image-2.6-sunburst).

### Is MiniMax H3 Image open source?

Its weights are public on Hugging Face under the MiniMax-H3-Image Community License. In Sloosh you use it in Image Studio with no setup.

## Sources

- [MiniMax image generation guide](https://platform.minimax.io/docs/guides/image-generation)
- [MiniMax-H3-Image on Hugging Face](https://huggingface.co/MiniMaxAI/MiniMax-H3-Image)