Kling Legacy

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 ID	Special Features	Duration	Credits
`kling-v2.6`	Native audio, keyframe control	3-15s	150
`kling-v2.6-motion`	Camera trajectory control	varies	150
`kling-v2.5`	—	5 or 10s only	100
`kling-v2.1`	—	5 or 10s	100
`kling-v2`	—	5 or 10s	100

Kling V2.6

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

Native audio

cURL

curl -X POST https://api.varg.ai/v2/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 } }
  }'

Keyframe control

cURL

curl -X POST https://api.varg.ai/v2/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" }
    ]
  }'

Motion control

Camera trajectory control for precise camera movements:

cURL

curl -X POST https://api.varg.ai/v2/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
  }'

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,
})

curl -X POST https://api.varg.ai/v2/video \
  -H "Authorization: Bearer $VARG_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "kling-v2.5",
    "prompt": "a sunset over the ocean, waves gently rolling",
    "duration": 5
  }'

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.

Get Started

Models

SDK

Templates

MCP

AI Agents

Comparisons

Kling Legacy

Overview

Kling V2.6

Native audio

Keyframe control

Motion control

Kling V2.5

Migration to Kling V3

Kling V3

​Overview

​Kling V2.6

​Native audio

​Keyframe control

​Motion control

​Kling V2.5

​Migration to Kling V3

​Related models

Kling V3

Overview

Kling V2.6

Native audio

Keyframe control

Motion control

Kling V2.5

Migration to Kling V3

Related models