kling-4.0/flash-keyframe-to-video

Kling 4.0 Flash is the Flash model in the Kling 4.0 family, which Kling positions for faster generation and greater value. On ModelFold, the Kling 4.0 Flash API offers two models: Reference to Video, which accepts a prompt with optional reference images, elements, or reference videos, and Keyframe to Video, which generates a video from a single first-frame image. Both output 720p MP4 clips from 3 to 20 seconds.

Pricing: From 20.4 credits / sec at 720p (102 credits for 5 seconds), billed on output seconds. Every resolution is in the rate card below.

Playground

Pre-filled from the model spec — run it as-is, or tweak any field first.

Ready

FormJSON

Prompt

Animate @first_frame as one continuous shot: the ceramic artist gently shapes the clay bowl with both hands, soft window light, the camera slowly pushes in.

Video description

First frame

Change imageRemove

Duration3

Output video duration

Resolution

720P

Aspect ratio

16:9

Output video aspect ratio. Only effects when the first frame is active.

Balance: —Estimated reservation62 credits(estimated before generation; actual charge shown on completion)

ResetRun

Result

PreviewJSON

HistoryDownload

Sample output for this variant — press Run to generate your own.

curl https://modelfold.ai/v1/videos/generations \
  -H "Authorization: Bearer $MODELFOLD_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"kling-4.0/flash-keyframe-to-video","prompt":"...","resolution":"720p","duration":5}'