# MiniMax H3 Max MiniMax H3 Max in Sloosh: a faster H3 for text or start-and-end-frame video with sound, 5 to 15 seconds at up to 1080p. Last updated: 2026-10-05 **Key facts** - MiniMax H3 Max is fal's faster, post-trained version of MiniMax H3, released jointly with MiniMax and tuned for prompt adherence and looks. - MiniMax H3 Max makes 5 to 15 second clips in Sloosh at 480p, 768p or 1080p, and defaults to 768p. - MiniMax H3 Max takes text or a start frame with an optional end frame, and no reference images. - MiniMax H3 Max always makes sound and has a seed setting in Sloosh. Web page: https://sloosh.ai/docs/minimax-h3-max MiniMax H3 Max is a faster version of H3, tuned for prompt adherence and looks. It takes text or a start and end frame, up to 1080p, and always makes sound. It gives a different take from H3, not a sharper copy. ## When to use it - Quick iterations and drafts. - Animating from a start frame when 1080p is enough. - For 2K or 4K, use [MiniMax H3](https://sloosh.ai/docs/minimax-h3.md). ## How to prompt it - MiniMax's order: reference notes first, then the core idea (subject, place, event, style), then the scene in order: action, camera, sound. - Write camera moves in plain English with size and speed: "The camera pushes in with small amplitude at slow speed." One move per continuous shot. - Say "one continuous shot, no cuts" for a single take; otherwise "then" can turn into a cut. - Keep sound, music and speech apart: "Sound: ...", "Music: ...". Put spoken lines in quotes with the speaker, language and tone. Every clip has sound. - Write constraints as plain sentences; there's no negative prompt. Stay under about 7,000 characters. - With a start frame, don't describe the frame again: describe what changes from it. ## Example The empty counter is the start frame; the prompt adds one action and keeps the camera still. Input: start frame: ![An empty white marble bathroom counter by a window with sheer curtains and a small fern](https://sloosh.ai/docs/in-counter.webp) -> Result: [![A hand placing a small amber bottle on the marble counter beside the fern](https://sloosh.ai/docs/m-minimax-h3-max.webp)](https://sloosh.ai/docs/m-minimax-h3-max.mp4) (video) _16:9, 768p, 6 seconds, Enhance off. Clips here play without sound; press one to pause._ **Prompt** ```text One continuous shot, no cuts. Starting from this empty marble counter, a hand slides a small amber glass serum bottle into frame from the right and sets it down beside the fern. The camera stays still at eye level; the morning light and curtains stay the same. The sheer curtain moves gently in a breeze. Sound: quiet bathroom ambience, a soft glass tap on marble at 3 seconds. No music. ``` ## Settings in Sloosh - Aspect ratio: 21:9, 16:9, 4:3, 1:1, 3:4 or 9:16. - Resolution: 480p, 768p or 1080p. - Length: 5 to 15 seconds. - References: none. - Start and end frames: both optional. - Sound: always on. - Seed: available, to repeat a result. - Prompt: up to 50,000 characters. Open it in [Video](https://sloosh.ai/studio/video) and pick MiniMax H3 Max in the model chip. The Generate button shows the cost first. ## Frequently asked questions ### MiniMax H3 vs MiniMax H3 Max: which should I use? Use MiniMax H3 Max for quick drafts and clips where 1080p is enough; fal says a five-second 768p clip can finish in under three seconds. Use [MiniMax H3](https://sloosh.ai/docs/minimax-h3.md) for 2K or 4K. H3 Max gives a different take on a prompt, not a sharper copy of H3. ### What resolution does MiniMax H3 Max make? MiniMax H3 Max offers 480p, 768p and 1080p in Sloosh, and starts at 768p. It has no 2K or 4K option; for those higher resolutions, use [MiniMax H3](https://sloosh.ai/docs/minimax-h3.md), which starts at 2K. ### How do I prompt MiniMax H3 Max from a start frame? Don't describe the start frame again: describe what changes from it, in order, with one camera move and a "Sound:" line. With an end frame too, describe the path between the two; MiniMax says first-to-last generation favours a single shot. ### Can MiniMax H3 Max use reference images? No. MiniMax H3 Max takes text or a start and end frame only. For the same faster model guided by up to 9 reference images, pick [MiniMax H3 Max Reference](https://sloosh.ai/docs/minimax-h3-max-reference.md) in the model chip. ## Sources - [fal: how to use MiniMax H3 Max](https://fal.ai/learn/tools/how-to-use-minimax-h3-max) - [MiniMax H3 prompt guide](https://huggingface.co/MiniMaxAI/MiniMax-H3/blob/main/docs/VIDEO_PROMPT_WRITING_GUIDE_base_en.md)