What it is: MiniMax H3 is an omni-modal video model from Shanghai's MiniMax. You feed it text — and optionally an image, a reference video, or reference audio — and it returns up to a 15-second 2K (2560×1440, 24fps) clip with synchronized native stereo audio: dialogue, sound effects, and ambient sound generated in the same pass as the picture, not dubbed on afterward (MarkTechPost via the MiniMax announcement). It launched July 30–31, 2026.

Who made it: MiniMax, the Shanghai lab behind the Hailuo video app and the MiniMax-M-series text models. H3 is its push to undercut ByteDance and Google on price while doing something neither does — shipping open weights (SCMP).

Who it's for: solo founders and small teams whose next feature is short-form video with sound — ads, social spots, explainers, product demos — and who'd like the option to run the model themselves down the road.

How to start (easiest path first)#

  1. Just look: open the Hailuo app and generate from a prompt — no code, good for a first impression of quality and the audio.
  2. Build on it: use the MiniMax platform API at platform.minimax.io. Get an API key, POST a generation request with your prompt plus any image/video/audio references, poll the job, and download the MP4. Video generation is asynchronous, and request fields shift between releases, so build against the current docs rather than a copy-pasted snippet.
  3. Already on OpenRouter? It's exposed as minimax/hailuo-3, so you can route it alongside your other models on one bill.

What it costs#

MiniMax's pay-as-you-go page lists roughly $0.13 per second at 2K and $0.09 per second at 768p (768p is in closed beta). A 10-second 2K clip is on the order of a dollar-plus in raw generation cost; the Hailuo app has its own consumer tiers. Resolution and length dominate the bill, so price your clip length — and ignore cross-vendor per-second comparisons, which quote different resolutions and audio settings.

The license line that decides if it's free for you#

MiniMax says it will publish H3's weights "in the coming days" under the MiniMax Community License — reportedly free for non-commercial use and free for commercial use by organizations under US$20 million in annual revenue, with attribution (SCMP). For most solopreneurs, that's free commercial use. But this is a revenue-gated license, not MIT — the same structure that trips builders up elsewhere — so read the actual text and note the attribution obligation before you ship.

The honest caveat#

There is no independent quality benchmark of H3 yet — the "editing ranks #1" and "under a third the price" lines are MiniMax's own, and early-tester consensus is that H3's real edge is cost-per-pixel and audio integration, while dedicated action models still lead on high-motion cinematography. Prototype on the API, judge the output with your own eyes on your own prompts, and if you're weighing it against the closed incumbents, we laid out that decision in MiniMax H3 vs Veo 3.1 vs Kling 3.0 vs Seedance 2.0.