Generate images with the MiniMax H3 Image API. 13 aspect ratios, 1K to 4K output and built-in prompt enhancement. Pay per generation. MiniMax H3 Image generates images from text with built-in prompt enhancement, 13 aspect ratios and 1K, 2K or 4K output.
MiniMax H3 Image generates images from text with built-in prompt enhancement, 13 aspect ratios and 1K, 2K or 4K output.
About this model
MiniMax H3 Image is MiniMax's image generation and editing model, with built-in prompt enhancement that expands short prompts into detailed instructions. The MiniMax H3 Image text-to-image API renders at 1K, 2K or 4K (up to 20 megapixels), supports 13 aspect ratios from 1:2 to 2:1 and 9:21 to 21:9, and returns PNG, JPG or WEBP. Edit or combine references with MiniMax H3 Image Edit, or compare the faster tier with MiniMax H3 Image Highspeed.
Cost analysis
| Provider | Cost | Notes |
|---|---|---|
| muapiapp | $0.03/image (1K, 2K), $0.09/image (4K) | Pay-per-generation pricing, no subscription required. |
| Fal.ai | Not available | No dedicated MiniMax H3 Image endpoint confirmed at this time. |
| Replicate | Not available | No dedicated MiniMax H3 Image endpoint confirmed at this time. |
Pay-per-generation pricing, no subscription required.
No dedicated MiniMax H3 Image endpoint confirmed at this time.
No dedicated MiniMax H3 Image endpoint confirmed at this time.
** Competitor pricing is estimated based on similar model architectures and usage tiers.
Configuration schema
| Parameter | Type | Description | Default |
|---|---|---|---|
| Prompt | string | Text prompt describing the image to generate | A frosted glass serum bottle on wet travertine stone, soft morning light, editorial product photography |
| Aspect Ratio | Enum (13 options) | Aspect ratio of the output image. | 1:1 |
| Resolution | Enum (3 options) | Output resolution tier: 1K, 2K or 4K. | 1K |
| Output Format | Enum (3 options) | Format of the output image. | png |
Text prompt describing the image to generate
A frosted glass serum bottle on wet travertine stone, soft morning light, editorial product photographyAspect ratio of the output image.
1:1Output resolution tier: 1K, 2K or 4K.
1KFormat of the output image.
pngDeveloper documentation
Write a descriptive prompt: the built-in prompt enhancement expands short prompts, but specifics on subject, lighting and composition help.
Pick an aspect_ratio such as 1:1, 4:5, 16:9, 9:16 or 21:9.
Choose resolution (1K, 2K or 4K) and output_format (png, jpg or webp).
Submit and poll the returned request_id, or pass a webhook URL.
curl -X POST https://api.muapi.ai/api/v1/minimax-h3-image-text-to-image \
-H "x-api-key: $MUAPI_API_KEY" \
-H "Content-Type: application/json" \
-d '{"prompt": "A frosted glass serum bottle on wet travertine stone, soft morning light", "aspect_ratio": "4:5", "resolution": "2K"}'
Frequently asked
MiniMax H3 Image is MiniMax's H3 image generation model, with built-in prompt enhancement and 1K, 2K and 4K output.
$0.03 per image at 1K and 2K and $0.09 at 4K. Aspect ratio and output format add no extra charge. Pay per generation with no subscription.
Output is available at 1K, 2K and 4K as PNG, JPG or WEBP, set with `resolution` and `output_format`.
Thirteen ratios including 1:1, 4:5, 3:2, 16:9, 9:16 and 21:9, set with `aspect_ratio`.
Both accept the same parameters. Highspeed is the faster tier and is priced at twice the standard rate; use it for drafts and high-volume jobs, and the standard tier when you want the lowest price per image.
Requests are asynchronous: submit a job, then poll the returned `request_id` or pass a `webhook` URL to be notified on completion.
Yes. Sandbox API keys return mock results instantly with no credits deducted.