The H3 brief, at a lighter tier
MiniMax H3 Highspeed reads what H3 reads: a written prompt, a first frame, a first and a last frame, or up to 9 reference images with video and audio beside them. MiniMax pitches Highspeed between quality and speed. Same inputs as H3, a quicker render.
Sizes and lengths
Renders come out at 480P or 768P, any whole second from 4 to 15. 7 frame settings: adaptive, 16:9, 21:9, 4:3, 1:1, 3:4 and 9:16. Text-to-video needs a concrete ratio.
On OpenClips
MiniMax H3 Highspeed runs in the composer from ⚡33 per render. The composer quotes the exact ⚡ for your length and size before anything runs.