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21:9 高调光渲染:左侧奶油色光晕留白,右侧悬浮半透明玻璃画板与虹彩光带,玻璃蚀刻发光展示名 minimax-h3-image;冰蓝青与腮红粉点缀,暖金对位高光。

MiniMax

MiniMax H3 Image

minimax-h3-image/image-to-image

MiniMax image model: text-to-image and editing with 1–16 reference images share one capability set, with output up to 4K, support for ten aspect ratios plus automatic ratio, suited to concept design, commercial visuals, and multi-style creation

Try minimax-h3-image/image-to-image

Input

Output

image
Fill in the parameters and run — results show up here.

Pricing

minimax-h3-image/image-to-image per image

Specifications Unit Price
1K $0.0129 + $0.0036 Per Reference Image
2K $0.0129 + $0.0036 Per Reference Image
4K $0.0393 + $0.0036 Per Reference Image

Positioning Overview

Designed for developers with image editing and composition needs, it provides an image-to-image generation service based on reference images. It accepts 1 to 16 JPG, PNG, or WEBP images as references, which are cited in the prompt in image order as Picture 1, Picture 2, and so on, to describe the edits or blends to be performed. The output is a static image, supporting three resolution tiers—1K, 2K, and 4K—as well as multiple aspect ratios, with a choice of JPEG or PNG format. It is suitable for concept design, visual material retouching, and multi-image composition.

Core Highlights

  • Multi-image reference fusion support—up to 16 reference images can be submitted in a single request to edit or combine multiple images, with each reference image billed individually.
  • Selectable output resolution tiers—three output resolution tiers are offered: 1K, 2K, and 4K, approximately 1MP, 4MP, and 16MP respectively, selectable according to the intended use of the material.
  • Reproducible results with a fixed seed—the seed parameter can fix the random seed to reproduce results; when omitted, a random seed is used.
  • Automatic aspect ratio selection—aspect_ratio defaults to auto, with the model determining the output ratio based on the prompt and reference images; 10 fixed ratios can also be specified.

Capabilities

Multi-image reference editing and fusion: Submit 1 to 16 reference images and an editing prompt of up to 5000 characters, referencing Picture 1, Picture 2, etc. in image order, to edit existing images or combine multiple images into a new composition, outputting a static image.

Output resolution and aspect control: resolution can be set to 1K, 2K, or 4K, corresponding to approximately 1MP, 4MP, and 16MP outputs; aspect_ratio supports 11 aspect ratios including 1:1, 16:9, and 21:9, defaulting to auto, with the model deciding automatically based on the prompt and reference images.

Output format and seed control: output_format can be jpeg or png; PNG is approximately 12MB at 2K and approximately 30MB at 4K; seed accepts integers from 0 to 2147483647 for reproducing results, and is random if omitted.

Use Cases

  • Concept design retouching based on reference images—designers upload character or scene reference images and describe the desired changes to obtain edited concept images for option exploration and visual communication.
  • Multi-image composition of commercial visual materials—multiple product images or background images are input as references to generate fused high-resolution materials for advertising and e-commerce display.
  • Instruction-based editing of existing images—operations staff or content creators upload existing images and describe the required adjustments to output modified static images for social media or page illustrations.

Limitations and Selection Advice

Each request must include at least 1 and at most 16 reference images, with each image side length between 128 and 8192 pixels, size no greater than 20MB, and format limited to JPG, PNG, or WEBP. The prompt can be up to 5000 characters and must contain non-whitespace content. Reference images are billed per image. The output is a static image; generating video or audio content is not supported. PNG files are significantly larger than JPEG, at approximately 30MB at 4K, so storage and transmission overhead should be taken into account.

  • New model MiniMax H3 Image is live: text-to-image and multi-reference editing

Frequently asked questions

View all FAQs →
  • How many reference images can be provided at most?

    Image-to-image accepts a maximum of 16 reference images and a minimum of 1. Formats are JPG, PNG, or WEBP, with each side between 128–8192 px and each image no larger than 20 MB. Each reference image costs an additional $0.0036; for example, 2K with 3 reference images costs $0.0129 + 3 × $0.0036 = $0.0237 in total. When writing prompts, refer to each image by number such as Picture 1, Picture 2 in the order they were passed in, so the model can correctly map to the objects you want to edit or combine.

  • How are the output dimensions determined, and how large can they get?

    Resolution comes in three tiers: 1K, 2K, and 4K, roughly 1 MP, 4 MP, and 16 MP respectively, with 2K as the default. Aspect ratio can be auto or 1:1, 5:4, 4:5, 4:3, 3:4, 3:2, 2:3, 16:9, 9:16, 21:9; when auto is selected, the model decides based on the prompt and reference images, so specify it explicitly if you need a fixed composition.

  • How should I write the prompt to preserve the character's appearance?

    Organize it in this order: first describe the subject you want to keep, then write the parts you want to change, and finally refer to images by number: ① Start with one or two sentences fixing the subject's appearance features, such as hairstyle, clothing, color scheme, and signature details; ② Then specify the target scene, pose, camera, and lighting; ③ When you need to reference a reference image, write "the person in Picture 1", numbering multiple images in the order they are passed in. Prompts are capped at 5000 characters; putting details in the body text is more effective than piling up adjectives.

  • How can I create multi-angle character design sheets for the same character?

    First use a clear, unobstructed reference image of the subject as Picture 1, fix the character feature description in the prompt, then generate the images one by one and change only the description of the angle or pose, for example front, side, back, half-body, and full-body, with the aspect ratio fixed at 3:4 or 1:1. Keeping the same seed for each image helps reduce random variation; the stylistic consistency of a series mainly depends on the reference image plus a fixed subject description.

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