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What is MiniMax H3 Max?
MiniMax H3 Max is the 480p and 768p variant of MiniMax H3 with the full H3 control set. It renders video at 24 fps with native audio, runs 5 to 15 seconds per generation, and takes text alone, a start frame with an optional end frame, 1 to 9 reference images, up to 3 reference videos, and up to 3 reference audio clips alongside images or videos. A seed and a prompt expansion level (disabled, balanced, quality) are optional on every request. For a faster, text-and-frames-only version, see MiniMax H3 Max Turbo.
Key features of MiniMax H3 Max
The full H3 control set at 480p or 768p
Reference images, reference videos, reference audio, start and end frames, a seed and a prompt expansion level all work the same way as on H3, so a request tuned here moves to H3 unchanged when 2K is needed.
Reference-to-video
Pass 1 to 9 reference images and name them in the prompt as @Image1 through @Image9. The first 2 images are included in the per-second price and each extra image is billed. Reference images cannot be combined with start/end frames in one request.
Reference videos and audio
Up to 3 reference videos in video_urls and up to 3 audio clips in audio_urls, 15 seconds in total across both. Each second of uploaded video is billed; audio is free and needs reference images or videos in the same request.
Seed and prompt expansion
A seed repeats a result with the same inputs. prompt_expansion sets how much the model rewrites the prompt: disabled sends it as written, balanced is the default, quality rewrites more.
Native audio in the same pass
Output arrives with an audio track generated alongside the picture, no separate audio step.
What MiniMax H3 Max is best for
Character-locked series
Reference images keep the same character across every video in a campaign, at 768p with sound.
Character-in-location shots
Pass the character as @Image1 and the setting as @Image2, and the prompt places one inside the other.
Repeatable renders
Fix the seed and set prompt_expansion to disabled to get the same result from the same request.
Start-and-end frame spots
Pin the open and the close as key art and let the model animate the move between them.
MiniMax H3 Max use cases
Run a product campaign where the same mascot appears in ten videos by sending the character sheet as reference images. Put a product into a new scene by passing the product and the location as two reference images. Build a vertical 9:16 spot with sound for social feeds in one call. Pass a reference video and an audio clip to carry their motion and sound into a new shot. For pinned compositions, pass a start frame, optionally with an end frame, and the output follows the input frame's ratio.
MiniMax H3 Max limitations
H3 Max caps at 768p; for 2K output use MiniMax H3. The shortest generation is 5 seconds, not 4. Only the first 2 reference images are included in the price; MiniMax H3 Fast charges nothing per image. Reference images and frame images are mutually exclusive in one request, an end frame needs a start frame, and reference audio needs reference images or videos. Duration is capped at 15 seconds per generation and reference videos plus audio at 15 seconds in total.
MiniMax H3 Max API examples
Call MiniMax H3 Max from any language by POSTing to /v1/tasks. Full parameter docs live at docs.unifically.com/models/video/minimax/hailuo.
curl -X POST https://api.unifically.com/v1/tasks \
-H "Content-Type: application/json" \
-H "Authorization: Bearer YOUR_API_KEY" \
-d '{
"model": "hailuo/minimax-h3-max",
"input": {
"prompt": "A slow dolly shot across a rain-soaked neon street, reflections rippling in the puddles",
"aspect_ratio": "16:9",
"resolution": "768p",
"duration": 5,
"prompt_expansion": "balanced"
}
}'
Successful submission returns a task_id. Poll GET /v1/tasks/<task_id> or set a callback_url on the request to receive the finished result.
FAQs
People also ask about MiniMax H3 Max
Resolution, minimum duration and reference-image billing. H3 Max outputs 480p or 768p and runs 5 to 15 seconds; H3 outputs 768p or 2K and runs 4 to 15 seconds. Both take a prompt, a start frame with an optional end frame, up to 9 reference images, up to 3 reference videos, up to 3 reference audio clips, a seed and a prompt expansion level, with native audio. H3 Max includes the first 2 reference images in the price; H3 includes the first 5.
$0.045/sec at 480p and $0.072/sec at 768p, billed per second of output. The first 2 reference images are included and each extra image is billed; a reference video is billed per second of uploaded video. Reference audio is free.
480p and 768p through the resolution parameter. The default is 768p. aspect_ratio controls the output shape when no start or end frame is supplied; pick a fixed ratio (the auto option exists only on MiniMax H3 and H3 Lite).
Yes. Pass up to 3 reference videos in video_urls and up to 3 audio clips in audio_urls, 15 seconds in total across both. Audio needs reference images or videos in the same request. Each second of uploaded video is billed; audio is free.
No. image_urls cannot be combined with start_frame_url or end_frame_url in one request. Use frames for pinned compositions and reference images for subject or style control. An end frame also needs a start frame.
Yes. seed makes a result repeatable with the same inputs, and prompt_expansion (disabled, balanced, quality) sets how much the model rewrites the prompt before generating.
Any whole second from 5 to 15 per generation. The default is 5; there is no 4-second option on H3 Max.
MiniMax H3 Max guides and comparisons
Review pricing, limits, and tested outputs before running this model.
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MiniMax Hailuo H3 API
2K at 24 fps with native audio, 4-15s, six aspect ratios, start/end frames, up to 9 reference images and 3 reference videos.
- Text to Video
- Image to Video
- Reference to Video
MiniMax H3 Max Turbo API
Distilled H3 Max: text or start/end frames only, 480p or 768p, 5-15s, six aspect ratios, seed and prompt expansion.
- Text to Video
- Image to Video