Kuaishou Technology’s Kling generative video unit has begun closed beta testing for Kling 4.0, with an official launch scheduled for October. The model supports native videos of up to 30 seconds, as many as 10 keyframe inputs, improved stability for large-scale motion and complex camera movements, and 4K or 1080p 10-bit HDR output. Kling also introduced Kling 4.0 Flash, a lower-cost version optimized for high-frequency creative work that is available for trials ahead of the public rollout. An earlier account said Kling 4.0 launched on September 28, creating a status discrepancy with the latest announcement. Kling’s previous 3.0 series, released in February 2026, introduced native 4K output. The unit reached approximately $500 million in annualized recurring revenue by March 2026, up from roughly $240 million in December 2025, while second-quarter 2026 revenue exceeded RMB 850 million, up 200% year over year. Kling still contributes less than 3% of Kuaishou’s total revenue. Kuaishou raised approximately 20.45 billion yuan in July 2026 at a valuation of around $18 billion for Kling, with Tencent, Alibaba and Baidu reportedly participating, and filed plans in May 2026 to spin off the unit ahead of a potential Hong Kong IPO targeting 2027.