Multimodal video model · MiniMax
MiniMax H3 Guide: References, 2K, and Genflow Settings
A source-reviewed specification and integration guide to MiniMax H3, including the mode-specific controls currently exposed in Genflow.
The short answer
MiniMax H3 is MiniMax's multimodal video model for text, keyframe, and reference-driven generation. Official H3 supports native stereo audio, 4–15 second output, 768P or 2K, and text, image, video, and audio context. In Genflow, keyframe mode takes a required first frame plus an optional last frame and uses an adaptive ratio. Reference mode accepts image, video, and audio references and offers six ratios. Both modes offer 4–15 seconds and 768P or 2K; Genflow currently exposes no generated-audio control, and soundtrack behavior was not tested for this review.
When to choose it
Use this page as a mode and settings reference, not as an output-quality ranking. Genflow's H3 integration exposes keyframe and reference modes and no standalone text-to-video entry; text-only requests remain available through reference mode without assets. No generated-audio control is exposed. This review did not run first-party output tests, so test a representative brief before selecting H3 for production.
Official model facts
What the official sources say
Vendor documented capabilities, kept separate from Genflow product settings.
Unified multimodal context
MiniMax documents H3 as accepting text, images, video, and audio in one context. Its reference route can condition a result on appearance, motion, camera, style, voice, or editing rhythm.
Native video and stereo audio
The official launch and model card describe joint video and native stereo-audio generation. In Genflow, reference mode can accept audio as an input, but the current model configuration exposes no generated-audio control. Actual soundtrack behavior was not tested in this review.
4–15 seconds at 768P or 2K
The current MiniMax API documentation lists every whole-second duration from 4 through 15 and output at 768P or 2K for H3.
Keyframe and reference routes
Official H3 supports text-only generation, first- or last-frame guidance, two-keyframe generation, and a separate reference mode. MiniMax notes that keyframe and reference inputs cannot be mixed in one API request.
Released checkpoints with a separate full 2K path
MiniMax released FL2VA and Ref2VA base checkpoints under its H3 Community License. The official model card says local base reproduction targets 768p, while the full 2K workflow also uses MiniMax's hosted Context-IR and regeneration services.
Genflow
Available in Genflow
Read directly from the current Genflow model configuration.
Where it fits
- Keyframe mode accepts a required opening frame and an optional closing frame; Genflow sends the frame-derived adaptive ratio.
- Genflow's reference schema accepts up to nine images, three videos, and three audio files, while MiniMax caps a request at 12 reference files combined; the mode exposes six output ratios.
- Both exposed modes support every whole-second duration from 4 through 15.
- Both exposed modes list 768P and 2K output options in the current Genflow configuration.
What to review
- Genflow currently exposes keyframe-to-video and reference-to-video for H3, not the standalone text-to-video route described in MiniMax's API documentation.
- Audio files can be reference inputs, but Genflow's current H3 configuration exposes no generated-audio control; soundtrack behavior was not tested.
- No first-party H3 outputs were generated for this review, so it makes no claims about fidelity, product truth, text rendering, hands, physics, cuts, or motion quality.
- The released H3 checkpoints use MiniMax's Community License, which also addresses third-party hosted services. This review did not establish which provider terms govern Genflow access; review the terms applicable to your use.
MiniMax H3
Practical use cases
Two-frame motion test
Supply a required opening frame and, optionally, a closing frame. Genflow derives the ratio from the frames, so this mode does not offer the six-ratio selector. Compare the output with both inputs before production use.
Mixed-reference test
Reference mode can take images, videos, and audio inputs. Genflow's per-type schema permits nine images, three videos, and three audio files, but MiniMax caps the combined request at 12 files and limits each video or audio clip to 2–15 seconds and each type to 15 seconds total.
Reference-mode ratio test
Reference mode exposes 21:9, 16:9, 4:3, 1:1, 3:4, and 9:16. Generate and review each required ratio separately; this ratio list does not apply to keyframe mode.
Generated-audio boundary check
Genflow can pass audio into H3 reference mode, but its current H3 configuration exposes no generated-audio control. Soundtrack behavior was not tested, so verify the output and a separate audio workflow before committing to the model.
FAQ
Questions creators ask
What is MiniMax H3?
MiniMax H3 is a multimodal video-generation model from MiniMax. Official documentation describes text, keyframe, and reference-driven routes, native stereo audio, 4–15 second output, and 768P or 2K resolution.
Which MiniMax H3 settings are available in Genflow?
Genflow exposes two H3 modes. Keyframe-to-video takes a required first frame plus an optional last frame and uses an adaptive ratio rather than a ratio selector. Reference-to-video accepts images, video, and audio and offers 21:9, 16:9, 4:3, 1:1, 3:4, and 9:16; MiniMax caps references at 12 files combined. Both modes list 4–15 seconds and 768P or 2K. Text-only requests can use reference mode without assets.
Does MiniMax H3 generate audio in Genflow?
Genflow currently exposes no generated-audio control. MiniMax's official H3 supports native stereo audio, and Genflow reference mode can accept audio files as inputs, but this review did not test the resulting soundtrack behavior. Confirm the live Studio settings and a sample output before production because integrations can change.
Is MiniMax H3 open source?
MiniMax describes the release as open source, but the H3 checkpoints are governed by the MiniMax H3 Community License rather than an unrestricted grant. The license also addresses third-party hosted services. The official model card says local base reproduction targets 768p and the full 2K workflow uses hosted Context-IR and regeneration services. This review did not establish the provider terms applicable to Genflow access.
Is MiniMax H3 the same as H3 Max?
No. MiniMax's documentation lists H3 and H3 Max as separate models. H3 is the reference-capable model with 768P and 2K output; H3 Max is a faster post-trained variant with a different mode and resolution set. Genflow currently lists MiniMax H3, not H3 Max.
Primary sources
Facts on this page are checked against these official model sources.