How Do I Write Prompts for MiniMax H3?

Overview

Write prompts as a short brief, not a keyword pile. A clear MiniMax H3 prompt names four things: the subject, the action, the camera or shot, and the mood or audio you want. That structure gives the model direction and gives you something specific to adjust when a result misses the mark.

Source note: Verified 2026-08-06 against the MiniMax official H3 blog, MiniMax Video Generation API docs, and Hugging Face MiniMax-H3 model page.

Move from general to specific. Start with the subject and setting, then describe the motion you expect over the clip, since video needs a sense of change through time, not just a still scene that happens to move a little. Add camera language such as a slow push-in or a fixed wide shot when framing matters to the story. If the model supports audio in the same generation, describe the soundscape or dialogue tone rather than leaving it to chance and hoping. Keep one idea per clip; trying to pack three scene changes into a few seconds usually produces mush that no prompt tweak can rescue.

Iterate in small steps. Change one variable at a time so you know what caused a change, save the prompts that work, and build a short internal style guide from them. That library of proven prompts becomes far more valuable over a project than any single clever one-off.

Exact prompt syntax and supported controls vary by version and platform, so check the current model docs and confirm which fields your specific route actually accepts before standardizing a format.