Early access ends, opened to all users
China's Kuaishou announced on Kling's official X account on Nov. 4 (early Nov. 5 Japan time) that it had opened "Kling 4.0 Flash," a lightweight version of its video generation AI "Kling 4.0," to all users. It can be used on Kling's website and through its API. It can also be called through "MCP," a common mechanism for AI agents to call outside tools, a command-line "CLI" and AI plugins.
Kling 4.0 Flash Is Now Fully Available! ⚡ Kling 4.0 Flash is now available to everyone on the Kling AI website and via API. You can also access it through MCP, CLI, and AI plugins, bringing greater flexibility to your video creation workflows.
The post further said users can generate with Kling plugins for Photoshop for image editing, Premiere Pro for video editing and After Effects for visual effects. According to Kling's guide, the plugin supports Photoshop, Figma, Premiere Pro and After Effects. In Premiere Pro, generated video goes into a new track above the original footage, and in After Effects into a new layer.
A little over a month after September's early access
Kuaishou announced Kling 4.0 on Sept. 28 and offered Flash early on the same day. Access was limited to users on an annual contract for the top "Ultra" plan.
The higher-end Kling 4.0 was released on Oct. 15, and applications for API access opened on Oct. 21. Fal of the U.S. opened Kling 4.0 to all its users on Oct. 23. With this opening, Flash, like the higher-end version, can now be used on both the web and the API.
- Kling 4.0 announced; Flash offered early to Ultra annual subscribersOfficial
- Higher-end Kling 4.0 releasedOfficial
- Applications for Kling 4.0 API access openedOfficial
- Fal of the U.S. opens Kling 4.0 to all usersReport
- Flash opened to all users; available via web, API, MCP, CLI and pluginsOfficial
Up to 20 seconds at 720p, no keyframe control
Flash is a version focused on speed and can create 3- to 20-second videos in one run. Resolution is 720p only, and color range is standard (8-bit SDR). It can create videos in three ways: from text, from an image of the first scene, or using reference images or video. Features to specify the first and last scenes or to line up keyframe images are not available.
The higher-end Kling 4.0 can create up to 30 seconds per run at 1080p, with 4K and wide-color 10-bit HDR "coming soon." Up to 10 keyframe images and up to 15 reference materials can be specified, and audio comes in two channels, left and right.
Kuaishou describes Flash as faster than the higher-end version and cheaper to use. However, it has not given figures for generation time. Scores for Kling 4.0 and Flash also cannot be found on third-party evaluation sites such as Artificial Analysis.
| Item | Kling 4.0 Flash | Kling 4.0 |
|---|---|---|
| Length per run | 3-20 seconds | 3-30 seconds |
| Resolution | 720p | 720p, 1080p (4K coming soon) |
| Color range | 8-bit SDR | 10-bit HDR (coming soon) |
| First and last scene control | No | Yes |
| Keyframe images | Not available | Up to 10 |
Flash pricing undisclosed; higher-end version cheaper than Seedance, pricier than Wan
As of Nov. 5, Flash pricing had not been disclosed, neither the per-second API rate nor the number of credits used on the web. Articles from various companies that reported the specifications during the early access period also described Flash pricing as "undisclosed."
The higher-end Kling 4.0 costs $0.157 per second at 720p and $0.235 at 1080p on fal, making a 30-second 1080p video about $7.05. When AIReiter compared fal's listed prices as of Oct. 23, Kling 4.0 at 1080p per second was cheaper than ByteDance's Seedance 2.5 (about $0.35) and more expensive than Alibaba's Wan 3.0 (about $0.20) and Vidu Q4 (about $0.096). The fast version of the previous generation, Kling 3.0 Turbo, cost $1.12 for a 10-second 720p video on Kling's API.
Video generation pricing has no separate input and output as with text AI and is set by the number of seconds of video created. Vidu Q4 has a maximum length of 16 seconds per run.
Kling revenue tops 850 million yuan in April-June quarter
According to Kuaishou, Kling's revenue for the April-June quarter of 2026 exceeded 850 million yuan, more than three times the same period a year earlier. That was up from more than 650 million yuan in the January-March quarter. Kuaishou's overall revenue for the April-June quarter, however, rose only 1.4% from a year earlier to 35.535 billion yuan, and operating profit fell 29.0%.
