Kling 2.1 Master is a high-fidelity video generation model developed by Kuaishou and the flagship variant of the Kling 2.1 series. Released in May 2025, it is engineered for professional cinematic production, offering superior motion dynamics and prompt adherence compared to standard versions. The model supports both text-to-video and image-to-video workflows, producing 1080p (Full HD) resolution clips with native durations of 5 or 10 seconds.
The architecture is based on a Diffusion Transformer (DiT) framework utilizing a 3D spatiotemporal joint attention mechanism. This design enables the model to simulate complex real-world physics, including natural fluid motion, realistic hair and fabric dynamics, and intricate human gestures. The "Master" tier is characterized by more intensive joint-attention passes during inference, which enhances scene coherence and character consistency across the video sequence.
Key capabilities include advanced camera control through text instructions—such as dolly-zoom, panning, and tilting—and multi-frame reference consistency. It also incorporates an automated ambient audio generation system that synchronizes sound effects with visual events. The model supports various aspect ratios, including 16:9, 9:16, and 1:1, making it suitable for a wide range of creative and commercial applications.