MiniMax has released the weights of its H3 video model, making it the first open model to top an AI video ranking. This milestone highlights the growing competitiveness of open-source models in video generation.
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MiniMax releases H3 video model weights, becoming the first open-source model to top AI video rankings, but the 2K resolution module and context processing module remain closed-source, and commercial licensing is restricted for high-revenue companies.
MiniMax released the H3 video model weights on August 3, 2026, and according to The Decoder, this is the first time an open-source model has topped AI video rankings. The Artificial Analysis leaderboard shows H3 ranking first in video editing, second in text-to-video, and third in image-to-video.
H3 is a 33-billion-parameter model that can jointly process text, images, video, and audio, generating 4 to 15-second clips with stereo sound. According to the model card, a single prompt can include up to 9 reference images, 3 video clips, and 3 audio clips.
Despite the open weights, two key components remain closed: the 2K resolution module and H3-Context-IR (which converts prompts and reference materials into a structured intermediate format). As a result, local runs of H3 in ComfyUI are capped at 768p, and users must handle context preparation themselves based on MiniMax's prompt guide.
The open weights allow fine-tuning on custom materials, characters, or specific visual styles, but there is a licensing restriction: commercial use is only permitted for companies with annual revenue below $20 million.
On the same day, ByteDance released closed-source Seedance 2.5, capable of generating 30-second clips with built-in audio. This contrast highlights the competitive landscape between open and closed-source models in video generation.
This article's information primarily comes from The Decoder's report, which cites the Artificial Analysis rankings and the model card on HuggingFace. All specific data (such as parameter counts, rankings, and licensing terms) are from these sources but have not been independently verified.
MiniMax H3's open-source release is a significant milestone in video generation, but the closed-source modules and commercial restrictions mean its openness is limited. Users must weigh the performance limitations of local runs against the licensing conditions for commercial use.
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