Kling 4.0 Flash Is Fully Available With an API: 3-20 Second 720P Videos via Text, Image and Omni Reference Generation
Kling AI announced on November 4 that Kling 4.0 Flash is open to all users on the website and via API, and is also reachable through MCP, CLI and AI plugins, including Photoshop, Premiere Pro and After Effects. The official API changelog says the Flash API generates 3 to 20 second videos at 720P, supports text-to-video, image-to-video and Omni reference-to-video, accepts up to 15 inputs per task and bills by total duration.

Key Takeaways
- Flash had been in early access for Ultra yearly subscribers since September 28; it is now open to all users and the API.
- The API paths are kling-4.0-flash under /text-to-video, /image-to-video and /omni-video; image-to-video takes a single first-frame image.
- Prompts can be up to 26,000 English characters, with up to 10 reference images and 5 reference videos, plus 21:9 and adaptive aspect ratios.
- Billing is by the total duration of input and output video; unit prices are on the official pricing page and were not stated in the announcement.







