MiniMax H3

Hailuo H3 is the newest video generation model from MiniMax, the Shanghai AI lab behind the Hailuo video app and the MiniMax text and audio model families. H3 generates native 2K video with synchronized audio in a single pass, at clip lengths up to 15 seconds.

Developed by MiniMax. All credit for the model goes to the MiniMax team. This page carries four versions of H3:

• Comfy - the open weights. Generate with them on-site (the only version that takes LoRAs), or download them and run them yourself. The ComfyUI-format weights are also available from MiniMax and Comfy-Org on Hugging Face.
• Api - H3 through the hosted MiniMax API, at native 2K.
• Max - MiniMax's H3 Max release, with a faster Max Turbo option, at 480p, 768p, or 1080p.
• HeyGen - HeyGen Video 1, HeyGen's model built on H3, at 480p or 768p. Credit for this version goes to the HeyGen team.

Background

MiniMax has shipped video models under the Hailuo name since 2024, moving from the I2V-01 series through Hailuo 02 and Hailuo 2.3. Those earlier models topped out around 1080p with fixed 6 or 10 second clips and no native sound. H3 is the step past that: it raises the ceiling to 2K, opens the clip length to any integer from 4 to 15 seconds, and folds audio generation into the same pass as the picture rather than bolting it on afterward.

Capabilities

• Native 2K output (2560x1440 at 16:9)
• Clips from 4 to 15 seconds, in one second increments
• Synchronized audio generated with the video - dialogue, effects, and ambience timed to what is on screen
• Text-to-video, image-to-video, and first frame plus last frame control
• Omni-reference conditioning: up to 9 reference images, 3 reference video clips, and 3 reference audio clips
• Multi-shot sequences and instruction-based editing

On Civitai

H3 is wired into the video generator across four workflows: Create Video (text only), Image to Video (single first frame), First/Last Frame (both endpoints), and Reference to Video (up to 9 reference images). Pick the version from the model selector:

• Api - resolution is fixed at 2K, the only output this version produces.
• Max - choose 480p, 768p, or 1080p, and switch on Turbo for faster Max Turbo generations. Set a seed to repeat a result.
• HeyGen - choose 480p or 768p, with a seed. It takes a first frame but no last frame, so it is not offered under First/Last Frame.
• Comfy - runs the open weights and takes LoRAs, with control over steps and a turbo LoRA.

Aspect ratio is selectable at 16:9, 4:3, 1:1, 3:4, and 9:16 for text prompts and reference images; when you supply a frame image, the framing follows that image instead.

Reference video and reference audio inputs are supported by the models but are not exposed in the Civitai form yet.

Notes

H3 is a new model and MiniMax has not published a full spec sheet or a stable pricing page for it. Behavior and cost may shift as they finish the rollout. The Api, Max, and HeyGen versions are commercially hosted services, and content is subject to each provider's policies, so expect refusals on material their APIs decline.

Links

• MiniMax video generation docs
• Hailuo AI
• MiniMax
• HeyGen
• MiniMax Hailuo AI Terms of Service