13.6B dense architecture
All parameters stay active so LongCat Video keeps subjects, lighting, and framing stable across long clips.
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LongCat Video
LongCat Video features for production teams
Everything you need to keep minutes-long AI footage coherent, on-brand, and ready for real workflows.
Coarse-to-fine speedup
Draft quickly, then refine to crisp 720p 30fps output without rebuilding the whole generation workflow.
Block Sparse Attention
Efficient attention keeps longer sequences practical while preserving motion continuity and visual quality.
GRPO multi-reward tuning
Quality, motion, and text alignment are balanced so generated footage stays faithful to the prompt.
Continuation-native training
Extend shots naturally with fewer scene resets, color shifts, or identity breaks.
MIT license & open weights
Use LongCat Video commercially, fine-tune privately, and deploy workflows into your own production stack.