Kling 4.0

Kling 4.0 is Kuaishou’s announced next-generation AI video model. Its published capabilities include 3–30-second generation, up to 4K output, up to 10 keyframes, multimodal references, stereo audio and video editing.

The official announcement schedules Kling 4.0 for October 2026. Kling 4.0 Flash opened limited early access on September 28, 2026. These are Kuaishou’s release plans; 光谱汇深 API availability will be announced separately.

Kling 4.0 is announced with 3–30-second generation at 720p, 1080p or 4K, plus first-and-last-frame and flexible-keyframe control. Flash lists 3–20-second generation at 720p and 8-bit SDR, with text-to-video, first-frame image-to-video and multimodal references. Main-model limits should not be assumed to apply to Flash.

For Kling 4.0, the combined total is up to 15 image, video, voice and subject reference items. Individual limits are 10 images, 5 videos totaling at most 30 seconds, and 7 subjects including at most 3 video subjects. Video-subject duration counts toward the video total. Supported 光谱汇深 API fields will be documented after integration.

Not yet. This is a preview of the announced models. 光谱汇深 will publish supported models, endpoints, parameters and availability after integration is confirmed; early access on Kling’s own platform does not mean 光谱汇深 API access is live.

光谱汇深 pricing for Kling 4.0 and Flash has not been announced. Model-specific credit prices and billing rules will be published when access is confirmed.

The official announcement marks 10-bit HDR at 1080p and 4K, and repeated video extension up to 2 minutes, as coming soon. Two minutes refers to the result of repeated extensions, not a single generation; the main model’s announced single-generation duration is 3–30 seconds.

You can submit a support ticket from the dashboard or email us at support@apimart.ai. Our team will get back to you as soon as possible.