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MiniMax H3 Open: Text-to-Video with Audio on Models and API | RunComfy

minimax/minimax-h3-open/text-to-video

MiniMax H3 Open creates 5–15s videos from text at 480p or 768p with native stereo audio in one pass.

Scene, motion, camera, and optional Audio: line for the soundtrack.
Aspect ratio of the generated video.
Output resolution. 480p is faster/cheaper; 768p is sharper.
Length of the generated video in seconds (5–15).
Fixed seed for reproducible results. Use -1 for a random seed.
Idle
The rate is $0.05 per second for 480p, and $0.09 per second for 768p.

Introduction To MiniMax H3 Open

MiniMax's MiniMax H3 Open turns a written shot list into a 480p or 768p clip with picture and native stereo audio rendered together.
Trading separate video passes plus late-stage dubbing for one prompt that covers motion, camera, and sound, MiniMax H3 Open helps marketers, previz artists, and social teams draft audiovisual ideas faster.
For developers, MiniMax H3 Open on RunComfy can be used both in the browser and via an HTTP API, so you don't need to host or scale the model yourself.
Ideal for: Ad Storyboards | Social Hooks | Scene Previz

MiniMax / MiniMax H3 Open Text To Video#


This page covers the open-weights text-to-video path in the MiniMax H3 family. You describe visuals, camera moves, and sound in one prompt; the model returns an MP4 with matching stereo audio at 480p or 768p.


Use it when you want a lower-cost open-weights H3 route for prompt trials, storyboards, and short social drafts. Start at 5 seconds to lock composition and audio, then lengthen once the beat works. For the official MiniMax H3 text-to-video endpoint with different resolution tiers, see the related MiniMax H3 models on RunComfy.

Related Models

hunyuan/text-to-video

Turn text prompts into high quality videos with Tencent Hunyuan Video.

ace-step-1.5/text-to-audio

Generates up to 4-minute songs with vocals from style tags and lyrics

seedance-2.5/reference-to-video/480p

Seedance 2.5 Reference 480p: Multi-reference draft video at lower cost

seed-audio-1.0/text-to-audio

Generates natural speech and audio from text, reference audio, or an image

seedance-1.0/pro-fast/image-to-video

Create lifelike video motion fast with Seedance Pro for design pros

kling-video-o1/image-to-video

Transform static visuals into cinematic motion with Kling O1's precise scene control and lifelike generation.

Frequently Asked Questions

What is MiniMax H3 Open best used for?

MiniMax H3 Open is an open-weights text-to-video model that turns a written prompt into a short clip with picture and native stereo audio together. It fits prompt trials, storyboards, and social drafts when you want 480p or 768p output without a separate sound-design pass.

How does MiniMax H3 Open differ from the official MiniMax H3 text-to-video model?

MiniMax H3 Open is the open-weights H3 text-to-video path with 480p and 768p output and per-second billing at those tiers. The official MiniMax H3 text-to-video model on RunComfy uses different resolution options (such as 768p and 2K). Pick MiniMax H3 Open for the open-weights route; use official MiniMax H3 when you need that product's resolution ladder.

What duration, resolution, and aspect ratios does MiniMax H3 Open support?

MiniMax H3 Open supports duration from 5 to 15 seconds (default 5), resolution 480p or 768p, and aspect ratios 21:9, 16:9, 4:3, 1:1, 3:4, 9:16, and 9:21. Check the RunComfy parameter panel for the live controls on this page.

Does MiniMax H3 Open generate audio with the video?

Yes. MiniMax H3 Open renders native stereo audio in the same pass as the picture—dialogue cues, effects, and ambience can be steered with an Audio: line in the prompt. If you omit audio direction, the model still supplies a soundtrack.

How should I write prompts for MiniMax H3 Open?

For MiniMax H3 Open, structure the prompt as style, a short timestamped timeline, explicit camera moves, and an Audio: line with entrance cues. Iterate at 5 seconds to lock composition and sound, then raise duration once the beat works. A short negative list (no text, no cuts) helps reduce drift.

Can developers call MiniMax H3 Open through the RunComfy API after trying it in the UI?

Yes. Prototype in the RunComfy model UI, then call the same MiniMax H3 Open template through the RunComfy API with matching parameters. Generations consume usd / credits on both paths; scale volume once the prompt looks right.

How much does MiniMax H3 Open cost on RunComfy?

MiniMax H3 Open is billed per second of generated video: $0.05 per second at 480p and $0.09 per second at 768p. A 5-second 480p clip costs about $0.25; longer durations scale linearly with the length you select.

When should I choose 480p versus 768p on MiniMax H3 Open?

Use 480p on MiniMax H3 Open for faster, cheaper drafts and batch variants. Switch to 768p when you need sharper finals for reviews, ads, or platforms that favor higher resolution.

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Examples Of MiniMax H3 Open

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