{"version":"1","model":{"id":"kling/v4/text-to-video","name":"Kling 4.0 (T2V)","kind":"video","availability":"available","available":true,"restricted":false,"api_key_only":false,"description":"Kling 4.0 text-to-video with native stereo audio, cinematic motion, ultrawide framing, and optional per-shot prompts. Generate 3–30 seconds at 720p or 1080p.","categories":["t2v"],"prompt_required":false,"prompt_supported":true,"input_fields":["prompt","multi_prompt","duration","resolution","aspect_ratio"],"supports":{"audioGeneration":true},"aspect_ratios":["16:9","9:16","1:1","21:9"],"resolutions":["720p","1080p"],"durations":[3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30],"max_prompt_length":26000,"base_credits":147,"api_gross_margin_percent":20,"added_at":"2026-10-23","popularity_rank":324,"example_prompt":"A detective stands on a rainy rooftop at night. The camera slowly pushes toward her as distant traffic and rainfall fill the scene.","preview":{"image":"https://cdn.artemotion.ai/file/artemotion-ai-bckt/model-previews/kling-4-t2v-20261023-home-fal-v1.webp","video":"https://cdn.artemotion.ai/file/artemotion-ai-bckt/model-previews/kling-4-t2v-20261023-home-fal-v1-sm.mp4"},"schema_url":"/api/v1/models?id=kling%2Fv4%2Ftext-to-video","input_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","$id":"https://www.artemotion.ai/api/v1/models?id=kling%2Fv4%2Ftext-to-video","title":"Kling 4.0 (T2V) generation request","description":"Request body accepted by POST /api/v1/generate for kling/v4/text-to-video.","type":"object","properties":{"model_id":{"type":"string","const":"kling/v4/text-to-video","description":"ArtEmotion model identifier."},"extra":{"type":"object","additionalProperties":true,"description":"Model-specific settings may also be nested here."},"max_credits":{"type":"number","minimum":1,"description":"Reject before submission if the estimated list price exceeds this cap."},"webhook_url":{"type":"string","format":"uri","maxLength":2048},"webhook_secret":{"type":"string","maxLength":512},"folder_id":{"type":"string"},"prompt":{"type":"string","maxLength":26000},"multi_prompt":{"title":"Shot List","description":"Optional JSON shots: [{\"prompt\":\"A slow camera push\",\"duration\":5}]. Each prompt allows 512 characters. Total shot length must be 3–30 seconds and determines the credit estimate.","type":"array","items":{"type":"object"}},"duration":{"type":"number","enum":[3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30]},"resolution":{"type":"string","enum":["720p","1080p"]},"aspect_ratio":{"type":"string","enum":["16:9","9:16","1:1","21:9"]}},"required":["model_id"],"additionalProperties":false},"parameters":[{"key":"multi_prompt","label":"Shot List","type":"array","description":"Optional JSON shots: [{\"prompt\":\"A slow camera push\",\"duration\":5}]. Each prompt allows 512 characters. Total shot length must be 3–30 seconds and determines the credit estimate."}]}}