MiniMax H3 is a general-purpose multimodal AI video generator that turns text, images, video clips, and audio into finished cinematic scenes with native stereo sound. Unlike tools that output silent clips and force you to bolt on sound design afterward, every generation arrives with ambience, effects, music, and synced dialogue already in place. Mix up to 9 reference images, 3 video clips, and 3 audio tracks in a single request and the model reads your characters, choreography, camera moves, and voices together, then blends them into one coherent take at up to 1440p. Instruction-based editing lets you swap a character, relight a scene, replace a background, or rewrite a line of dialogue in plain language while everything you didn't touch stays pixel-stable — so you iterate shot by shot like a director giving notes instead of regenerating from scratch. It supports 21:9 through 9:16, handles on-screen text, brand marks, and product detail cleanly enough for ads and e-commerce listings, and is free to try with signup credits and no card required.