How Long Can MiniMax H3 Videos Be?

Overview

MiniMax H3 generates clips of 4 to 15 seconds, in whole-second increments only. So 15 seconds is the maximum length per generation, and you cannot request fractional durations. Source note: Verified 2026-08-06 against the MiniMax official H3 blog, MiniMax Video Generation API docs, and Hugging Face MiniMax-H3 model page.

That range shapes how you plan a longer piece. For anything beyond 15 seconds — a full ad or a scene — you generate several clips and assemble them in an editor, which also plays to the model’s strengths, since short, controlled clips hold together better than one long, complex take. Where you need continuity across clips, use reference inputs and consistent prompts so a character or product stays the same from shot to shot.

Duration also drives cost. If you want to compare how spend changes across 4-, 5-, 10-, and 15-second generations, this MiniMax H3 pricing by duration breakdown is useful for estimating the tradeoff. Because API pricing is per second, a 15-second clip costs roughly three times a 5-second one, so use the shortest length that tells the beat.

For a sequence, storyboard it as a series of 4–15 second beats rather than forcing one long generation, and confirm the current duration limits on the provider page, since a new model’s limits can shift as it matures.