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MiniMax H3 vs Seedance 2.5: model comparison

MiniMax H3 and Seedance 2.5 were run through the same five-test plan, so this is a direct A/B rather than a comparison assembled from unrelated reviews. In Mixer AI both support multimodal references and native audio; Seedance 2.5 accepts more inputs and reaches 30 seconds, while MiniMax H3 reaches 15 seconds and up to 2K.

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Key differences

MiniMax H3 in Mixer AI: first/last frames, up to 9 images, 3 videos and 3 audio files, 4–15 seconds, 768p/2K.

Seedance 2.5: up to 30 images, 10 videos and 10 audio files, up to 30 seconds, 480p/720p/1080p.

In the direct A/B, Seedance 2.5 was more stable on realism, macro detail, emotion and action; H3 sometimes preserved consistency but more often showed grainy AI texture and warping.

Specifications

Spec	MiniMax H3	Seedance 2.5
Generation modes	from text / from first and last frames / from references	from text / from first and last frames / from references / video editing
First frame	Yes	Yes
Last frame	Yes	Yes
Input photos	up to 9	up to 30
Input videos	up to 3	up to 10
Input audio files	up to 3	up to 10
Input video length	2–15 s	2–30 s
Input audio length	2–15 s	2–30 s
Output audio	Native	Can be enabled or disabled
Minimum duration	4 s	4 s
Maximum duration	15 s	30 s
Resolutions	768p / 2K	480p / 720p / 1080p
Aspect ratios	9:16 / 16:9 / 1:1 / 4:3 / 3:4 / 21:9	9:16 / 16:9 / 1:1 / 21:9 / 4:3 / 3:4 / adaptive
Prompt limit	7,000 characters	20,480 characters
Price, 1 s (different quality)	≈ 12.1 coins · 768p	≈ 41.38 coins · 720p

There is no shared resolution for a direct price comparison, so each price includes its setting and is not highlighted as cheaper.

Realism, liquid physics and camera control

The first test used a snorricam-style penguin dive. The reviewer found H3's fur and water visibly over-sharpened and grainy; Seedance looked more realistic, although its camera and penguin also rotated abnormally on water entry.
The reviewer explicitly says H3 looked better than older MiniMax versions, but the synthetic texture was still obvious in this shot.

Macro detail and object physics

In the sushi test, Seedance kept the chopping sequence and rice orientation consistent between shots. H3 warped less than expected, but the cucumber was crushed and the wrong part of the scallion was being cut.
Even where geometry held reasonably well, the reviewer again saw a slight grainy AI texture in H3, most clearly on the cucumber skin.

Emotion and character consistency

Both models struggled on the opening wide shot. H3 showed more warping and an extra arm; Seedance looked softer but avoided that deformation.
The reviewer rated Seedance voice acting and facial expressions higher. He still judged character and location consistency acceptable in both models.

Stylization and action

In the stylized bicycle scene, Seedance kept the animation and motion cleaner; H3 showed more warping, changed the bike direction and rendered the tears poorly.
In the action test, H3 produced one usable final close-up, but the reviewer found wider framing much less stable; Seedance held the sequence together more consistently.

Mixer AI facts versus review observations

Third-party credit and price numbers are not used here. Duration, resolution and reference limits come from the current Mixer AI configuration. Visual-quality statements remain observations from specific test prompts.

H3 reaches 2K but has a 15-second maximum.
Seedance 2.5 reaches 30 seconds and accepts substantially more image/video/audio references.
Even this direct A/B exposed weaknesses in both outputs, so a production scene should still be rerun with identical inputs.

Sources

Prices, availability and specifications come from the Mixer AI catalog. This is not an independent test: try both models on the same task before choosing.