H3 Max turns a prompt or still into 5–15 second MiniMax H3 Max videos with synced audio at 480P or 768P, billed per second of output.
- **Two input modes**: text-to-video, and image-to-video which requires a start frame and supports an optional end frame to pin where the shot lands.
- **Duration control**: whole-second lengths from 5 to 15 seconds, with 5 as the default.
- **Six aspect ratios for text-to-video**: 21:9, 16:9, 4:3, 1:1, 3:4, and 9:16 (16:9 default); image-to-video inherits the start frame's ratio.
- **Two resolutions**: 480P for drafts and 768P (1344×768, 24 FPS) for final takes.
- **Native audio**: sound effects and spoken dialogue render in the same pass as the picture; MiniMax lists dialogue as stable in 11 languages.
- **Per-second credit billing**: 7 credits per second at 480P, 15 per second at 768P.
- **Default generator model**: MiniMax H3 Max Turbo.
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AI video with native sound, paid per clip. Nothing stored.
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1H3 Max 4 looks seriously impressive! 🚀 Excited to see what it can do. 🔥