Veo 3.1 Fast — Extend Video

Create Veo 3.1 Fast — Extend Video

curl --request POST \
  --url https://api.apisale.ai/v1/run/google/veo-3.1/fast/extend-video \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "input": {
    "prompt": "Night drive through Tokyo side streets in the rain, neon reflections on wet asphalt, smooth camera tracking, cinematic motion",
    "auto_fix": false,
    "duration": "4s",
    "resolution": "720p",
    "aspect_ratio": "16:9",
    "generate_audio": false,
    "safety_tolerance": "4"
  }
}
'

import requests

url = "https://api.apisale.ai/v1/run/google/veo-3.1/fast/extend-video"

payload = { "input": {
        "prompt": "Night drive through Tokyo side streets in the rain, neon reflections on wet asphalt, smooth camera tracking, cinematic motion",
        "auto_fix": False,
        "duration": "4s",
        "resolution": "720p",
        "aspect_ratio": "16:9",
        "generate_audio": False,
        "safety_tolerance": "4"
    } }
headers = {
    "Authorization": "<api-key>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    input: {
      prompt: 'Night drive through Tokyo side streets in the rain, neon reflections on wet asphalt, smooth camera tracking, cinematic motion',
      auto_fix: false,
      duration: '4s',
      resolution: '720p',
      aspect_ratio: '16:9',
      generate_audio: false,
      safety_tolerance: '4'
    }
  })
};

fetch('https://api.apisale.ai/v1/run/google/veo-3.1/fast/extend-video', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

{
  "run_id": "<string>",
  "endpoint": "<string>",
  "model": "<string>",
  "capability": "<string>",
  "mode": "<string>",
  "status": "queued",
  "created_at": "2023-11-07T05:31:56Z",
  "output": {},
  "error": {
    "type": "<string>",
    "code": 123,
    "message": "<string>"
  },
  "billing": {
    "amount": "<string>",
    "currency": "usd"
  },
  "started_at": "2023-11-07T05:31:56Z",
  "completed_at": "2023-11-07T05:31:56Z",
  "elapsed_ms": 123
}

POST

run

google

veo-3.1

fast

extend-video

Create Veo 3.1 Fast — Extend Video

curl --request POST \
  --url https://api.apisale.ai/v1/run/google/veo-3.1/fast/extend-video \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "input": {
    "prompt": "Night drive through Tokyo side streets in the rain, neon reflections on wet asphalt, smooth camera tracking, cinematic motion",
    "auto_fix": false,
    "duration": "4s",
    "resolution": "720p",
    "aspect_ratio": "16:9",
    "generate_audio": false,
    "safety_tolerance": "4"
  }
}
'

import requests

url = "https://api.apisale.ai/v1/run/google/veo-3.1/fast/extend-video"

payload = { "input": {
        "prompt": "Night drive through Tokyo side streets in the rain, neon reflections on wet asphalt, smooth camera tracking, cinematic motion",
        "auto_fix": False,
        "duration": "4s",
        "resolution": "720p",
        "aspect_ratio": "16:9",
        "generate_audio": False,
        "safety_tolerance": "4"
    } }
headers = {
    "Authorization": "<api-key>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    input: {
      prompt: 'Night drive through Tokyo side streets in the rain, neon reflections on wet asphalt, smooth camera tracking, cinematic motion',
      auto_fix: false,
      duration: '4s',
      resolution: '720p',
      aspect_ratio: '16:9',
      generate_audio: false,
      safety_tolerance: '4'
    }
  })
};

fetch('https://api.apisale.ai/v1/run/google/veo-3.1/fast/extend-video', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

{
  "run_id": "<string>",
  "endpoint": "<string>",
  "model": "<string>",
  "capability": "<string>",
  "mode": "<string>",
  "status": "queued",
  "created_at": "2023-11-07T05:31:56Z",
  "output": {},
  "error": {
    "type": "<string>",
    "code": 123,
    "message": "<string>"
  },
  "billing": {
    "amount": "<string>",
    "currency": "usd"
  },
  "started_at": "2023-11-07T05:31:56Z",
  "completed_at": "2023-11-07T05:31:56Z",
  "elapsed_ms": 123
}

Overview

Google Veo 3.1 cinematic text/image-to-video with native audio; standard/Fast/Lite tiers. Optimized for video to video via apisale.

Docs = API contract + Try it (snapshot). Explore = browser playground. Model page = product examples.

Endpoint

POST https://api.apisale.ai/v1/run/google/veo-3.1/fast/extend-video


Model slug	`google/veo-3.1/fast/extend-video`
Category	Video to Video (`video-to-video`)
Lab	Google
Tier	Fast
Mode	async

Pricing

From $0.056/sec apisale price is 30% below the vendor’s official list price.

Tier	Unit	Official price	apisale price
fac6ad5b-32fd-47d7-8d2a-8efc46056b44	second	$0.100	$0.070
def99e8a-6381-44e4-8a40-9337cc606e4c	second	$0.120	$0.084
ff8b092e-a99c-49fe-b417-767d12a71918	second	$0.300	$0.210
01c96e66-e2a7-4c19-ad37-07ed6067af20	second	$0.080	$0.056
653a9128-fdc5-4d40-8e59-f38dda786408	second	$0.100	$0.070
c76f2e95-b96d-4919-a9e9-3c75ed21517e	second	$0.250	$0.175

Official price = vendor list price. apisale price = what you pay through apisale.

Request

{‌
  "input": {‌
    "prompt": "Night drive through Tokyo side streets in the rain, neon reflections on wet asphalt, smooth camera tracking, cinematic motion",
    "auto_fix": false,
    "duration": "4s",
    "resolution": "720p",
    "aspect_ratio": "16:9",
    "generate_audio": false,
    "safety_tolerance": "4"
  }
}

Parameters

Fields marked * are required. Use Authorization: Key YOUR_API_KEY for REST.

number

Optional random seed for reproducibility.

string

required

How the video should continue. Maximum 4000 characters.

boolean

Default: false

string

Length of the generated extension segment. Default: 7s Values: 4s, 5s, 6s, 7s, 8s

string

required

Veo-created video to extend (720p/1080p, 16:9 or 9:16).

string

Default: 720p Values: 720p, 1080p, 4k

string

Default: auto Values: auto, 16:9, 9:16

boolean

Default: true

string

—

string

Default: 4 Values: 1, 2, 3, 4, 5, 6

string

Optional HTTPS webhook when the run reaches a terminal state.

boolean

Block until completion (same Run response shape).

Input schema

{‌
  "params": {‌
    "seed": {‌
      "type": "int",
      "description": "Optional random seed for reproducibility."
    },
    "prompt": {‌
      "type": "string",
      "required": true,
      "max_length": 4000,
      "description": "How the video should continue. Maximum 4000 characters."
    },
    "auto_fix": {‌
      "type": "bool",
      "default": false
    },
    "duration": {‌
      "type": "enum",
      "values": [
        "4s",
        "5s",
        "6s",
        "7s",
        "8s"
      ],
      "default": "7s",
      "description": "Length of the generated extension segment."
    },
    "video_url": {‌
      "type": "media",
      "required": true,
      "description": "Veo-created video to extend (720p/1080p, 16:9 or 9:16)."
    },
    "resolution": {‌
      "type": "enum",
      "values": [
        "720p",
        "1080p",
        "4k"
      ],
      "default": "720p"
    },
    "aspect_ratio": {‌
      "type": "enum",
      "values": [
        "auto",
        "16:9",
        "9:16"
      ],
      "default": "auto"
    },
    "generate_audio": {‌
      "type": "bool",
      "default": true
    },
    "negative_prompt": {‌
      "type": "string",
      "max_length": 2000
    },
    "safety_tolerance": {‌
      "type": "enum",
      "values": [
        "1",
        "2",
        "3",
        "4",
        "5",
        "6"
      ],
      "default": "4"
    }
  }
}

Submit response

Returns a Run with run_id. Poll with GET /v1/runs/{run_id} or use Try it above.

string

required

Unique run ID — save for polling and webhooks.

string

required

queued (async) or terminal state for sync runs.

object

Result when status is succeeded — see Output schema below.

Example (async submit)

{
  "run_id": "run_550e8400-e29b-41d4-a716-446655440000",
  "endpoint": "google/veo-3.1/fast/extend-video",
  "model": "extend-video",
  "capability": "video",
  "mode": "video-to-video",
  "status": "queued",
  "output": null,
  "error": null,
  "billing": null,
  "created_at": "2026-06-27T12:00:00.000Z",
  "started_at": null,
  "completed_at": null,
  "elapsed_ms": null
}

Full lifecycle: Runs lifecycle.

Output

When status is succeeded, output follows this schema:

Output schema

{‌
  "type": "object",
  "example": {‌
    "videos": [
      {‌
        "url": "https://cdn.example.com/tasks/0.mp4"
      }
    ]
  },
  "required": [
    "videos"
  ],
  "properties": {‌
    "videos": {‌
      "type": "array",
      "items": {‌
        "type": "object",
        "required": [
          "url"
        ],
        "properties": {‌
          "url": {‌
            "type": "string",
            "format": "uri"
          }
        }
      }
    }
  },
  "description": "Succeeded task output: single video URL."
}

Example

curl -X POST "https://api.apisale.ai/v1/run/google/veo-3.1/fast/extend-video" \
  -H "Authorization: Key YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "input": {
    "prompt": "Night drive through Tokyo side streets in the rain, neon reflections on wet asphalt, smooth camera tracking, cinematic motion",
    "auto_fix": false,
    "duration": "4s",
    "resolution": "720p",
    "aspect_ratio": "16:9",
    "generate_audio": false,
    "safety_tolerance": "4"
  }
}'

Authorizations

Authorization

string

header

required

Key sk-... (native REST) or Bearer sk-... (vendor SDKs)

Body

application/json

input

object

required

Show child attributes

Example:

{
  "prompt": "Night drive through Tokyo side streets in the rain, neon reflections on wet asphalt, smooth camera tracking, cinematic motion",
  "auto_fix": false,
  "duration": "4s",
  "resolution": "720p",
  "aspect_ratio": "16:9",
  "generate_audio": false,
  "safety_tolerance": "4"
}

webhook_url

string<uri>

sync

boolean

default:false

Response

201 - application/json

Run accepted

run_id

string

required

Unique run identifier

endpoint

string

required

Model slug

model

string

required

capability

string

required

mode

string

required

status

enum<string>

required

Available options:

queued,

processing,

succeeded,

failed,

timeout,

cancelled

created_at

string<date-time>

required

output

object | null

error

object | null

Show child attributes

billing

object | null

Show child attributes

started_at

string<date-time> | null

completed_at

string<date-time> | null

elapsed_ms

number | null

Get Started

Overview

Image

Video

Audio

Model APIs

Official SDK compatibility

Platform API Reference

Veo 3.1 Fast — Extend Video

Overview

Endpoint

Pricing

Request

Parameters

Submit response

Example (async submit)

Output

Example

Authorizations

Body

Response

​Overview

​Endpoint

​Pricing

​Request

​Parameters

​Submit response

​Example (async submit)

​Output

​Example

​Related

Authorizations

Body

Response

Overview

Endpoint

Pricing

Request

Parameters

Submit response

Example (async submit)

Output

Example

Related