Overview
MiniMax H3 Image Highspeed is the faster API variant of MiniMax’s H3-Image generation model. It uses the same API parameters and limits as the standard variant. The H3-Image family is described by MiniMax as an open-weight model; the announcement does not separately establish that the Highspeed variant’s weights are available. (platform.minimax.io)
Capabilities and uses
- Generates images from text and edits images using a prompt and 1–16 reference images. Suitable uses include illustrations, visual concepts and reference-based image editing.
- Supports custom dimensions or aspect-ratio and area settings, including 1K, 2K and 4K area levels. Output area can be up to 20,000,000 pixels.
- Generates 1–10 images per request. Output formats are JPEG, PNG and WebP; responses can contain URLs or Base64 data.
- MiniMax claims Highspeed mode runs 3–4 times as fast as mainstream alternatives; actual speed depends on the task and conditions. (platform.minimax.io)
Limits
- Prompts are limited to 32,000 characters. With prompt enhancement disabled, only approximately the first 4,096 tokens take effect.
- Explicit output dimensions must have an area of 655,360–20,000,000 pixels and an aspect ratio between 1:3 and 3:1. Reference images must each be 128–8,192 pixels on each side, with a long-to-short side ratio no greater than 4:1.
- Preview images, masked edits and transparent backgrounds are not supported. Base64 responses do not support streaming and have a total-area limit. (platform.minimax.io)
Pricing
International MiniMax API, USD, checked November 15, 2026: input text is $2.30 per million tokens, input images are $3.00 per million tokens, and output images are $7.60 per million tokens. These are the Highspeed variant’s listed rates, not the standard variant’s rates. (platform.minimax.io)
A limited-time 50% discount on the total request cost applies when the delivered image has at least 16,600,000 pixels, until November 17, 2026 at 16:00 UTC, exclusive. The official page gives a Highspeed text-to-image example at 4096 × 4096 of $0.13001 per image before discount and $0.06501 during the offer. These per-image figures are examples, not fixed rates; actual costs may vary with input tokens, including prompt-enhancement tokens. (platform.minimax.io)
The official mainland pricing site was also checked, but a model-specific RMB price could not be verified from the accessible page. No currency conversion or third-party resale price has been substituted.
Release and official sources
- Release date: November 10, 2026, as listed for the H3 Image family in the official model release notes. The separate H3-Image announcement is dated November 11, 2026. (platform.minimax.io)
- Official image generation guide, including the Highspeed API ID and limits. (platform.minimax.io)
- Official international pricing overview, checked November 15, 2026. (platform.minimax.io)
- Official mainland pricing page, checked November 15, 2026; the redirected page could not be accessed for model-specific verification. ()