Write your prompt
Describe the subject, setting, style, lighting, and framing.
Powered by the official MiniMax H3 Image API
H3 Image Generator: MiniMax H3 Image Online
H3 Image turns a prompt — or up to 16 reference images — into a finished picture. Generate, edit, and download without any model setup.
Each successfully delivered image uses credits based on output resolution and reference image count. See the estimate before generating. · See pricing →
Official MiniMax APIUp to 4K outputUp to 10 images per requestNo installation
The image model
What Is H3 Image?
H3 Image (official model name MiniMax-H3-Image) is the image generation and editing model in MiniMax's H3 family. It does two jobs: turning a text prompt into a new image, and editing or composing from reference images you supply. It is available through MiniMax's official API as well as an open-source release.
What makes it different from a prompt-only generator is the reference input. H3 Image accepts up to 16 images in a single request, so you can replace a subject while keeping the background, merge several products into one composed scene, or carry the look of one image onto the content of another.
Gen Image AI is an independent product. We are not the developer or the official website of the MiniMax H3 model — we provide the interface, account system, credits, and generation history that let you use it.
Start Generating
How to Use the H3 Image Generator
Write a prompt, choose an available aspect ratio, generate, and download your result.
Choose an aspect ratio
Select an available ratio to fit the image destination.
Generate your image
Submit your prompt and review the result when generation finishes.
Review and download
Refine your prompt if needed, then download the image you want to keep.
What You Can Create with H3 Image
Create campaign visuals, product scenes, editorial artwork, portraits, and concept art from a written brief or reference images.
Marketing and social visuals
Campaign concepts, thumbnails, ad variations, and social posts in the ratio each channel needs.
Product and e-commerce scenes
Place a product in a new setting or combine items into a composed product shot with references.
Editorial and blog artwork
Article headers, explainers, and presentation visuals generated from a written brief.
Portraits, characters, and concept art
Explore photographic portraits, cinematic scenes, illustration styles, and character concepts.
Why Generate H3 Image on Gen Image AI
Real H3 Image output
Every image comes from MiniMax-H3-Image through the official API — not a similarly named proxy model.
Text-to-image and reference editing on one page
Switch modes without leaving the page or re-uploading your references.
Output up to 4K
Choose 1K, 2K, or 4K, or let H3 Image pick a ratio from your prompt. A 4K 16:9 image comes out at 5472×3072.
Up to 10 images per request
Generate a batch in one run and keep the one that works.
Cost shown before you generate
Credits are calculated and displayed up front, and failed images return eligible credits.
Full generation history
Every result stays in your account with its prompt, ratio, size, and the enhanced prompt actually used.
H3 Image Output Sizes and Aspect Ratios
Choose an aspect ratio and a 1K, 2K, or 4K output tier.
| Aspect ratio | 2K output | 4K output |
|---|---|---|
| 1:1 | 2048×2048 | 4096×4096 |
| 4:3 / 3:4 | 2368×1760 / 1760×2368 | 4736×3552 / 3552×4736 |
| 16:9 / 9:16 | 2720×1536 / 1536×2720 | 5472×3072 / 3072×5472 |
| 3:1 / 1:3 | 3552×1184 / 1184×3552 | 7104×2368 / 2368×7104 |
The table shows example sizes. Exact pixel dimensions depend on the provider.
Editing Images with Reference Images
Edit mode is where H3 Image differs most from single-prompt generators: upload between 1 and 16 images, then describe the result in plain language.
Example prompts that work well:
- “Replace the cat in image 1 with the dog in image 2, keep the background and lighting unchanged.”
- “Put the sneaker from image 1 into the street scene in image 2, match the perspective and shadows.”
- “Apply the color palette and texture of image 2 to the portrait in image 1.”
Upload up to 16 JPG, PNG, or WebP references, totaling 3 MiB or less.
H3 Image Prompt Tips
- 1. Lead with the subject, then the setting.“A ceramic coffee cup on a walnut desk by a rain-streaked window” beats “a nice cup”.
- 2. Name the light.Golden hour, overcast daylight, hard studio strobe, neon at night — light changes the result more than adjectives do.
- 3. Give the camera and framing.Close-up product shot, 35mm street photography, flat lay, wide establishing shot.
- 4. Don't repeat the ratio in the prompt.If you already set a ratio in the controls, describe the composition instead.
- 5. Reuse the enhanced prompt.H3 Image rewrites your prompt internally and shows you the version it actually used. Copy it, adjust one detail, generate again.
H3 Image vs. H3 Image Highspeed
| H3 Image | H3 Image Highspeed | |
|---|---|---|
| Best for | final renders and reference-image editing | fast iteration on prompts |
| Reference images | 1–16 | 1–16 |
| Area presets | 1K / 2K / 4K | 1K / 2K / 4K |
| Images per request | up to 10 | up to 10 |
| Parameters and limits | identical | identical |
Both variants take the same parameters and limits. Switch to Highspeed while you are still deciding on a prompt, then switch back to H3 Image for the final render.
Made for real creative work
What You Can Create with H3 Image
Start with the image’s intended use, then refine the prompt to fit your project.
Marketing and social visuals
Campaign concepts, thumbnails, ad variations, and social posts in the ratio each channel needs.
Product and e-commerce scenes
Place a product in a new setting or combine items into a composed product shot with references.
Editorial and blog artwork
Article headers, explainers, and presentation visuals generated from a written brief.
Portraits, characters, and concept art
Explore photographic portraits, cinematic scenes, illustration styles, and character concepts.
Common questions
H3 Image FAQ
What is H3 Image?+
H3 Image is the image generation and editing model in MiniMax's H3 family. Its official model name is MiniMax-H3-Image, and it is available through MiniMax's official API and as an open-source release.
What is P-H3-Image?+
P-H3-Image is another name you will see for this model in community releases and workflows. It refers to the same MiniMax H3 image model used here.
Does MiniMax H3 do images, or only video?+
Both. H3 is a family: it covers video generation, and separately MiniMax-H3-Image, which produces and edits still images. Searches for “h3 image” almost always mean this image model.
Is H3 Image free?+
No. Images on Gen Image AI are paid with credits, and the exact cost is shown before you generate. Any image that fails is returned to your balance.
How many images can I generate at once?+
Request up to 10 images at a time. The provider may return fewer. Credits are charged for images that are saved.
What is the maximum resolution?+
Choose 1K, 2K, or 4K. The exact pixel dimensions depend on the provider and aspect ratio.
Can I edit a photo I upload?+
Yes — that is edit mode. Upload 1–16 reference images and describe the change. Masked editing, transparent backgrounds, and preview images are not supported.
Can I write prompts in Chinese?+
Yes. Both English and Chinese prompts are accepted.
Can I download the images I generate?+
Yes. Every result can be downloaded individually from the result view and from your generation history.
How long does a generation take?+
Timing depends on resolution and image count. Saved images appear when the request finishes.
Is Gen Image AI the official MiniMax H3 website?+
Gen Image AI is an independent product that uses MiniMax H3 Image through OpenRouter.
What happens if an image fails?+
The batch is not lost. Images blocked by the content safety check or that fail during generation are reported individually, and eligible credits return automatically.
H3 Image is ready — describe what you want, or upload your references.
Describe what you want to create. Text-to-image generation is available now; H3 Image editing features will arrive as integration progresses.
Gen Image AI — H3 Image generator. Independent product, not affiliated with MiniMax.
Text-to-image generation
The exact credit cost is shown before you generate
Review and download results