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Overview

These are previous-generation Kling models. While still functional, Kling V3 is recommended for new projects. Legacy models may be useful if you need specific features like native audio (V2.6) or motion control.
Model IDSpecial FeaturesDurationCredits
kling-v2.6Native audio, keyframe control3-15s150
kling-v2.6-motionCamera trajectory controlvaries150
kling-v2.5—5 or 10s only100
kling-v2.1—5 or 10s100
kling-v2—5 or 10s100

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Kling V2.6

The most feature-rich legacy model. Supports native audio generation and first+last frame keyframe control.

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Native audio

cURL
curl -X POST https://api.varg.ai/v1/video \
  -H "Authorization: Bearer $VARG_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "kling-v2.6",
    "prompt": "a thunderstorm over a city skyline, lightning flashes",
    "duration": 10,
    "provider_options": { "varg": { "generate_audio": true } }
  }'

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Keyframe control

cURL
curl -X POST https://api.varg.ai/v1/video \
  -H "Authorization: Bearer $VARG_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "kling-v2.6",
    "prompt": "smooth transition between scenes",
    "duration": 5,
    "files": [
      { "url": "https://example.com/frame-a.jpg" },
      { "url": "https://example.com/frame-b.jpg" }
    ]
  }'

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Motion control

Camera trajectory control for precise camera movements:
cURL
curl -X POST https://api.varg.ai/v1/video \
  -H "Authorization: Bearer $VARG_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "kling-v2.6-motion",
    "prompt": "a park scene with trees and a fountain",
    "duration": 5
  }'

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Kling V2.5

Duration must be exactly 5 or 10 seconds. Other values will cause a 422 error.
const result = await varg.videoModel("kling-v2.5").generate({
  prompt: "a sunset over the ocean, waves gently rolling",
  duration: 5,
})

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Migration to Kling V3

If you’re using any legacy Kling model, upgrading to Kling V3 is straightforward: 
- const result = await varg.videoModel("kling-v2.6").generate({ ... })
+ const result = await varg.videoModel("kling-v3").generate({ ... })
Key differences:
  • V3 supports 3-15s (integer) vs V2.5/V2’s 5 or 10s only
  • V3 has better quality across the board
  • V3 Pro is the same price as V2.6 (150 credits)
  • V3 Standard (100 credits) offers similar quality to V2.6 at lower cost

Kling V3

Recommended upgrade. Better quality, flexible duration.