MiniMax H3

Positioning Overview

MiniMax H3 is a general-purpose video generation model released by MiniMax. It processes text, images, video, and audio simultaneously within a unified context, supports text-to-video, image-to-video, first-and-last-frame control, and multimodal reference-to-video generation, and can output native 2K video. Accessed through the unified HiAPI.ai interface, it is suited to developers who need to accomplish storyboard prototyping, asset animation, and character-style-consistent short videos with a single model, and is especially suitable for teams that need to cover multiple generation modes within a unified workflow.

Core Highlights

• Unified context carries multimodal inputs — text, image, video, and audio references can be combined within the same model, reducing the cost of switching to specialized models for different tasks.
• Native 2K output — currently generates only at native 2K resolution, with aspect ratios covering 21:9 to 9:16 and adaptive, meeting the needs of both landscape and portrait delivery.
• First-and-last-frame control for shot transitions — given a first-frame and a last-frame image, it can control the transition between the two images, making it convenient to produce transitions and before-and-after comparison shots.
• Multimodal references maintain consistency — supports up to 5 reference images, 3 reference videos, and 3 reference audio clips, used to continue character, style, and rhythm.

Capability Description

Text-to-video: generate a video with a whole-second duration of 4–15 seconds from a text prompt alone, with aspect ratio options of 21:9, 16:9, 4:3, 1:1, 3:4, 9:16, or adaptive, defaulting to 16:9.

Image-to-video and first-and-last-frame control: generate a video using a publicly accessible image as the first frame, or provide both a first frame and a last frame to control the transition; frame control and reference media fields are mutually exclusive, so the route must be determined in advance when selecting options.

Multimodal reference-to-video generation: accepts up to 5 reference images, 3 reference videos of 2–15 seconds each, and up to 3 reference audio clips with a total length not exceeding 15 seconds; audio cannot be used alone and must be paired with at least one image or one video.

Optional AIGC watermark: the watermark parameter determines whether the output video carries an AIGC watermark, and it is not added by default, making it easy to switch according to the compliance requirements of publishing channels.

Applicable Scenarios

• Advertising teams quickly prototype storyboards with text prompts — generate 4–15 second clips from multi-shot prompts as storyboard preview assets for creative review and client proposals.
• E-commerce design teams animate product images into short videos — use product images or illustrations as the first frame to generate 2K videos, directly usable for product detail pages and feed advertising assets.
• Content creators make transitions with first and last frames — control the transition by providing two images, front and back, and produce transition shots for short-video editing or before-and-after comparison demonstrations.
• Multimodal reference generation for character-consistent short videos — combine character images, style videos, and reference audio to generate style-consistent clips for batch production of serialized content.

Limitations and Selection Advice

The maximum duration per generation is 15 seconds; longer content needs to be generated in segments and then spliced together. First-and-last-frame control and reference media fields cannot be mixed; in reference mode, image, video, and audio inputs must be organized according to the rules, and there is a certain threshold for organizing prompts; reference audio cannot be used alone. If the task requires continuous long shots exceeding 15 seconds, resolution tiers below 2K, or a simpler pure-text generation workflow, other routes or models should be evaluated.