Current outcome
Kling 4.0 is now generally available with 30-second single-pass generation, up to 10 keyframes, 15-asset reference compositing and MCP/CLI access; 10-bit HDR, up to 2-minute extension and the developer API are still pending.
Progress timeline
2 material updates- #01
Kling 4.0把单次视频拉到30秒，10月上线
Kuaishou's Kling 4.0 is previewed with native 30-second video generation, 10 keyframe controls, up to 15 multimodal reference inputs, refined video editing, stereo audio and multilingual lip-sync, with the full release and API coming in October.
Source evidence: theblockbeats
- #02
可灵4.0全量上线：30秒1080P视频约16元，4K HDR却还得等
Kling 4.0 fully rolled out on October 15 (after only a Flash preview for some paying users in late September): ~450 credits (~¥16) for a 30s 1080P clip, new timeline/canvas/Agent features and MCP/CLI access, while 10-bit HDR, up to 2-minute extension and the developer API remain unavailable.
State after update: Kling 4.0 is now generally available with 30-second single-pass generation, up to 10 keyframes, 15-asset reference compositing and MCP/CLI access; 10-bit HDR, up to 2-minute extension and the developer API are still pending.
Source evidence: theblockbeats