Four families are worth knowing by name. MiniMax H3, published on Hugging Face on 28 July 2026, is a 33-billion-parameter transformer that generates video with stereo sound, 4 to 15 seconds long at 24 frames a second, with a 768-pixel short edge from the open weights, because its 2K stage is still available only through MiniMax's paid API. LTX-2.5 from Lightricks, published on 23 July 2026, is a 22-billion-parameter audio and video model whose production pipeline defaults to 1024 by 1536 at 24 frames a second and can reach 3840 by 2176. Both lean on large text encoders, Qwen3-VL-32B for H3 and a 12-billion-parameter Gemma 4 for LTX-2.5.

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