HedraImage to videoComing soon

kling-v3

Name: kling-v3
Brand: Hedra

kling-v3 is an image to video tool from Hedra that runs in the background and returns video. Coming soon: listed with its price, not yet open to runs.

This tool is listed but not yet available to run.

Price pending

Pricing

Price pending.

Limits

Runs: In the background
Returns: video
Longest queue wait: 3600s
Run deadline: 3600s
Largest inline input: 1024 KB
Largest input file: 500 MB
Largest output: 4768 MB
Outputs per run: 16

Input

Field	Kind	Default	Description
`duration_ms` required	one of 3000, 4000, 5000, 6000, 7000, 8000, 9000, 10000, 11000, 12000, 13000, 14000, 15000	—	Duration in ms.
`aspect_ratio` required	one of 16:9, 9:16, 1:1	—	Output aspect ratio.
`prompt`	text	—	Generation prompt. At most 2500 characters.
`quality`	one of standard, pro	standard	Quality level to generate at. `standard` — the 720p tier. `pro` — the high-resolution tier, at 1080p and 4K.
`cfg_scale`	number 0 to 1	—	How closely the model follows the prompt. From 0 to 1.
`end_image`	JSON	—	A file uploaded via POST /v3/files, referenced by the returned url.
`shot_type`	one of customize, intelligent	—	How a multi-shot storyboard is cut. 'customize' honours each shot's declared duration; 'intelligent' lets the model determine the shot structure. Ignored unless `multi_prompt` is supplied.
`resolution`	one of 1080p, 4K, 720p	—	Output resolution.
`num_outputs`	one of 1	1	Number of outputs generated per job. Only 1 is supported.
`start_image`	JSON	—	A file uploaded via POST /v3/files, referenced by the returned url.
`multi_prompt`	JSON	—	Multi-shot storyboard; each shot carries its own prompt and duration. Shot durations must sum to at most 15000 ms, and the storyboard replaces `prompt` — supply one or the other, never both. A shot's prompt has no length limit, unlike the single `prompt` field. 1 to 6 items.
`generate_audio`	true or false	true	Whether to generate native audio for the video.
`negative_prompt`	text	—	What to avoid in the generated video. At most 2500 characters.

Same request in code

curl https://api.spiral.ai/v1/runs \
  -H "Authorization: Bearer $SPIRAL_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $(uuidgen)" \
  -d '{
    "provider": "hedra",
    "model": "kling-v3",
    "input": {
      "duration_ms": 3000,
      "aspect_ratio": "16:9"
    }
  }'