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Ethereum co-founder Vitalik Buterin stated in a post that MiniMax H3 is the first open-source video model to surpass Tencent HunyuanVideo 1.5, and affirmed Tencent HunyuanVideo 1.5's long-term leading position. MiniMax H3 is an open-source multimodal video generation model released in August 2026, which supports unified input of text, images, videos, and audio. It can generate 15 second 2K videos with native stereo sound and ranks ahead in video editing benchmarks.