MiniMaxMiniMax H3 Max Extend API

Name: MiniMax H3 Max Extend API
Price: 0.055 USD
Author: MiniMax

Continue an existing video with newly generated footage — describe what happens next and get 5-15 more seconds, either appended to the source or on its own. Up to 2K.

Prompt

Source Video

Duration

Resolution

Aspect ratio

Billed at this model’s published rate.

Result

Your generations will appear here

Other models from MiniMax

Same vendor, same API call — the differences are below.

Model	Use case	Price	Resolution	Duration	Added
MiniMax H3 Max Recast	Video → Video	from $0.33 / sec	768p · 1080p	—	Nov 2026
MiniMax H3 Highspeed	Text → Video	from $0.0352 / sec	480P · 768P	5–15s	Nov 2026
MiniMax H3 Lite	Text → Video	from $0.022 / sec	480P · 768P	5–15s	Nov 2026
MiniMax M3	Image → Text	from $0.06 / 1M cached in	—	—	Oct 2026
MiniMax M3.1 Flash	Image → Text	from $0.015 / 1M cached in	—	—	Oct 2026
MiniMax H3 Context IR	Video → Text	from $0.45 / 1M in	—	4–15s	Oct 2026
MiniMax H3 Max Relight	Video → Video	from $0.055 / sec	480p · 768p · 1080p …	—	Oct 2026
MiniMax H3 Max Lip Sync	Image → Video	from $0.055 / sec	480p · 768p · 1080p …	—	Sep 2026

Install the SDK

TypeScript targets Node 20+ and ships with types; Python needs 3.10+ and is async. Over REST there is nothing to install: call https://api.picsart.com from any HTTP client.

bash

npm install @picsart/ai-sdk

Authenticate

Send your Picsart API key as a bearer token. The SDK does it for you once the client is created.

import { createClient } from '@picsart/ai-sdk';

const ai = createClient({
  apiKey: process.env.PICSART_API_KEY, // sent as: Authorization: Bearer <key>
  apiUrl: 'https://api.picsart.com',
});

python

import os

from picsart_ai_sdk import create_client

ai = create_client(
    api_key=os.environ["PICSART_API_KEY"],  # sent as: Authorization: Bearer <key>
    api_url="https://api.picsart.com",
)

Make a request

Call the model by its id. Over REST, one endpoint serves every model: POST /workflows/v1/models/execute with the model id and its input in the body. The outer params is the envelope every workflow takes; the inner one is this model's input, with the same names generate() takes.

import { createClient } from '@picsart/ai-sdk';

const ai = createClient({
  apiKey: process.env.PICSART_API_KEY,
  apiUrl: 'https://api.picsart.com',
});

const result = await ai.generate('minimax-h3-max-extend', {
  prompt: "A serene mountain lake at golden hour, ultra detailed",
  videoUrl: "https://cdn.example.com/input.mp4",
  duration: 5,
  aspectRatio: "auto",
  resolution: "768p"
});

console.log(result.url); // video URL

python

import asyncio
import os

from picsart_ai_sdk import create_client


async def main() -> None:
    async with create_client(
        api_key=os.environ["PICSART_API_KEY"],
        api_url="https://api.picsart.com",
    ) as ai:
        result = await ai.generate("minimax-h3-max-extend", {
            "prompt": "A serene mountain lake at golden hour, ultra detailed",
            "videoUrl": "https://cdn.example.com/input.mp4",
            "duration": 5,
            "aspectRatio": "auto",
            "resolution": "768p",
        })

        print(result.url)  # video URL


asyncio.run(main())

bash

curl -X POST 'https://api.picsart.com/workflows/v1/models/execute' \
  -H 'Authorization: Bearer $PICSART_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{
  "params": {
    "model": "minimax-h3-max-extend",
    "params": {
      "prompt": "A serene mountain lake at golden hour, ultra detailed",
      "videoUrl": "https://cdn.example.com/input.mp4",
      "duration": 5,
      "aspectRatio": "auto",
      "resolution": "768p"
    }
  }
}'

Async (submit & poll)

This model can run longer than the sync limit (~20s). generate() waits for you; to hold on to the job instead, submit it and poll. Over REST, send it to /workflows/v1/models/submit and poll /workflows/v1/models/{taskId}/result until response.status is COMPLETED or FAILED.

import { createClient } from '@picsart/ai-sdk';

const ai = createClient({
  apiKey: process.env.PICSART_API_KEY,
  apiUrl: 'https://api.picsart.com',
});

// Returns the generation id at once — store it to pick the job up later.
const generationId = await ai.submit('minimax-h3-max-extend', {
  prompt: "A serene mountain lake at golden hour, ultra detailed",
  videoUrl: "https://cdn.example.com/input.mp4",
  duration: 5,
  aspectRatio: "auto",
  resolution: "768p"
});

// Polls until the job completes; throws if it fails or is cancelled.
const result = await ai.result('minimax-h3-max-extend', generationId);

console.log(result.url); // video URL

python

import asyncio
import os

from picsart_ai_sdk import create_client


async def main() -> None:
    async with create_client(
        api_key=os.environ["PICSART_API_KEY"],
        api_url="https://api.picsart.com",
    ) as ai:
        # Returns the generation id at once — store it to pick the job up later.
        generation_id = await ai.submit("minimax-h3-max-extend", {
            "prompt": "A serene mountain lake at golden hour, ultra detailed",
            "videoUrl": "https://cdn.example.com/input.mp4",
            "duration": 5,
            "aspectRatio": "auto",
            "resolution": "768p",
        })

        # Polls until the job completes; raises ApiError if it fails or is cancelled.
        result = await ai.result("minimax-h3-max-extend", generation_id)

        print(result.url)  # video URL


asyncio.run(main())

bash

# 1. Submit the job
curl -X POST 'https://api.picsart.com/workflows/v1/models/submit' \
  -H 'Authorization: Bearer $PICSART_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{
  "params": {
    "model": "minimax-h3-max-extend",
    "params": {
      "prompt": "A serene mountain lake at golden hour, ultra detailed",
      "videoUrl": "https://cdn.example.com/input.mp4",
      "duration": 5,
      "aspectRatio": "auto",
      "resolution": "768p"
    }
  }
}'
# → { "status": "success", "response": { "id": "task_abc123" } }

# 2. Poll until response.status is COMPLETED
curl 'https://api.picsart.com/workflows/v1/models/task_abc123/result' \
  -H 'Authorization: Bearer $PICSART_API_KEY'

Parameters

9 parameters, the same for the SDK and for the inner params over REST. Required ones must be supplied; the rest fall back to their defaults.

Parameter	Type	Required	Default	Details
`prompt` What to make, in plain language: the subject, style, composition and motion. With an input image or video, what to change.	`text`	yes	`—`	e.g. "What happens next"
`videoUrl` The video to work on, as a URL.	`file (video)`	yes	`—`	max 60s
`duration` Length of the output, in seconds.	`range`	no	`5`	5–15 (step 1)
`output` Output	`enum`	no	`extended`	extended (Source + continuation), continuation (Continuation only)
`aspectRatio` Shape of the output as width:height. An auto or adaptive option follows the input image.	`enum`	no	`auto`	auto (follows the input), 21:9, 16:9, 4:3, 1:1, 3:4, 9:16
`resolution` Output size. Higher costs more and takes longer.	`enum`	no	`768p`	480p, 768p, 1080p, 2k
`enhancePrompt` Let the model rewrite the prompt for a better result before generating.	`boolean`	no	`true`	—
`enableSafetyChecker` Run the vendor's safety check on the result.	`boolean`	no	`true`	—
`seed` Seed for the random generator. The same seed and inputs repeat a result; leave it out for a random one.	`range`	no	`—`	0–2147483647 (step 1)

Response

generate() resolves once the job completes. A video URL. Over REST the output is at response.result, inside the gateway's status envelope with the task id, its status and the amount charged.

json

{
  "items": [
    {
      "url": "https://cdn.picsart.com/…/result"
    }
  ],
  "model": "minimax-h3-max-extend"
}

json

{
  "status": "success",
  "response": {
    "id": "task_abc123",
    "status": "COMPLETED",
    "result": {
      "url": "https://cdn.picsart.com/…/result",
      "items": [
        {
          "url": "https://cdn.picsart.com/…/result"
        }
      ],
      "model": "minimax-h3-max-extend"
    }
  }
}

Overview

Alongside the unified model APIs, we expose compatibility APIs that take each vendor's original parameters exactly as the vendor defines them — nothing renamed, nothing reshaped on the way through.

That makes them the shortest path onto Picsart if you already work with the vendor directly: the request bodies you've already written keep working as they are. You keep their parameter names and defaults, and you get the vendor's full parameter set rather than the subset that is shared across every model.

The cost is that a request is written for one vendor — switching models later means rewriting it, and results come back in the vendor's own shape. When you'd rather write once and change models freely, use the unified API.

Make a request

Call the workflow with ai.apis.run() in TypeScript or Python, or hit /workflows/{workflow}/execute directly — params is passed through untouched either way.

These endpoints are addressed by workflow name rather than model id: the one in this model's header, since one model runs as one workflow. Authentication is unchanged — your Picsart API key as a bearer token (see Authentication).

import { createClient, ApiRunMode } from '@picsart/ai-sdk';

const ai = createClient({
  apiKey: process.env.PICSART_API_KEY,
  apiUrl: 'https://api.picsart.com',
});

// Calls the 'minimax/h3-max/extend-video' workflow directly — params are sent as-is.
const { result, usage } = await ai.apis.run('minimax/h3-max/extend-video', {
  prompt: "The red panda keeps walking along the log, then looks up at a bird.",
  video_url: "https://storage.googleapis.com/falserverless/example_inputs/flux-3-red-panda.mp4"
}, {
  mode: ApiRunMode.SYNC,
});

console.log(result); // workflow-specific output
console.log(usage?.credits); // amount charged, in $

python

import asyncio
import os

from picsart_ai_sdk import ApiRunMode, create_client


async def main() -> None:
    async with create_client(
        api_key=os.environ["PICSART_API_KEY"],
        api_url="https://api.picsart.com",
    ) as ai:
        # Calls the 'minimax/h3-max/extend-video' workflow directly — params are sent as-is.
        response = await ai.apis.run("minimax/h3-max/extend-video", {
            "prompt": "The red panda keeps walking along the log, then looks up at a bird.",
            "video_url": "https://storage.googleapis.com/falserverless/example_inputs/flux-3-red-panda.mp4",
        }, mode=ApiRunMode.SYNC)

        print(response["result"])  # workflow-specific output
        print((response.get("usage") or {}).get("credits"))  # amount charged, in $


asyncio.run(main())

bash

curl -X POST 'https://api.picsart.com/workflows/minimax/h3-max/extend-video/execute' \
  -H 'Authorization: Bearer $PICSART_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{
  "params": {
    "prompt": "The red panda keeps walking along the log, then looks up at a bird.",
    "video_url": "https://storage.googleapis.com/falserverless/example_inputs/flux-3-red-panda.mp4"
  }
}'

Async (submit & poll)

This model can run longer than the sync limit (~20s). In the SDK, ai.apis.run() with ApiRunMode.ASYNC polls for you; over HTTP, submit and poll yourself.

import { createClient, ApiRunMode } from '@picsart/ai-sdk';

const ai = createClient({
  apiKey: process.env.PICSART_API_KEY,
  apiUrl: 'https://api.picsart.com',
});

// mode: ASYNC submits the job and polls under the hood — you just await.
const { result } = await ai.apis.run('minimax/h3-max/extend-video', {
  prompt: "The red panda keeps walking along the log, then looks up at a bird.",
  video_url: "https://storage.googleapis.com/falserverless/example_inputs/flux-3-red-panda.mp4"
}, {
  mode: ApiRunMode.ASYNC,
});

console.log(result);

python

import asyncio
import os

from picsart_ai_sdk import ApiRunMode, create_client


async def main() -> None:
    async with create_client(
        api_key=os.environ["PICSART_API_KEY"],
        api_url="https://api.picsart.com",
    ) as ai:
        # mode=ASYNC submits the job and polls under the hood — you just await.
        response = await ai.apis.run("minimax/h3-max/extend-video", {
            "prompt": "The red panda keeps walking along the log, then looks up at a bird.",
            "video_url": "https://storage.googleapis.com/falserverless/example_inputs/flux-3-red-panda.mp4",
        }, mode=ApiRunMode.ASYNC)

        print(response["result"])


asyncio.run(main())

bash

# 1. Submit the job
curl -X POST 'https://api.picsart.com/workflows/minimax/h3-max/extend-video/submit' \
  -H 'Authorization: Bearer $PICSART_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{
  "params": {
    "prompt": "The red panda keeps walking along the log, then looks up at a bird.",
    "video_url": "https://storage.googleapis.com/falserverless/example_inputs/flux-3-red-panda.mp4"
  }
}'
# → { "status": "success", "response": { "id": "wf_abc123" } }

# 2. Poll until response.status is COMPLETED
curl 'https://api.picsart.com/workflows/minimax/h3-max/extend-video/wf_abc123/result' \
  -H 'Authorization: Bearer $PICSART_API_KEY'

Parameters

11 parameters, sent inside params. These are the vendor's own names, so they line up one-for-one with the vendor's documentation. Required ones must be supplied; the rest fall back to their defaults.

Parameter	Type	Required	Default	Details
`enable_safety_checker` Moderate the source video and the prompt.	`boolean`	no	`true`	—
`reference_audio_urls` Optional audio references for the continuation (2–15 seconds each, 15 seconds combined). The full extended video retains its original source soundtrack, and its ending still conditions the transition. These clips guide the newly generated audio instead of using that soundtrack as an audio reference. Assign each clip a role in the prompt, such as 'Audio 1 for the voice' and 'Audio 2 for background music'.	`string[]`	no	`—`	max 3 items
`seed` Seed for the continuation. Random when omitted.	`integer`	no	`—`	—
`prompt` What happens next. Describe the continuation, not the source.	`string`	yes	`—`	1–50000 chars e.g. `The red panda keeps walking along the log, then looks up at a bird.`
`output` 'extended' returns the source and new footage as one video. 'continuation' returns a clip that starts with a 1.625-second repeat of the source's ending, then shows the new footage.	`string`	no	`extended`	`extendedcontinuation`
`video_url` URL of the video to extend. Must be 1.625 s to 60 s long, up to 50 MB, aspect ratio between 0.4 and 2.5.	`string`	yes	`—`	min 1 chars e.g. `https://storage.googleapis.com/falserverless/example_inputs/flux-3-red-panda.mp4`
`duration` Seconds of new footage to add. The continuation clip also includes 1.625 seconds from the source's ending and may be longer because of frame rounding.	`number`	no	`5`	0.71–15
`enable_prompt_expansion` Automatically enhance the prompt using the source video to help keep the continuation consistent. May increase processing time.	`boolean`	no	`true`	—
`resolution` Output video resolution.	`string`	no	`768P`	`480P768P1080P2K`
`aspect_ratio` Output aspect ratio. 'auto' follows the source video. Other values crop the video to fit the selected ratio.	`string`	no	`auto`	`auto21:916:94:31:13:49:16`
`options` Platform-specific options for safety checks and Picsart Drive integration.	`object`	no	`—`	—
└`safety_checks` Safety check configuration.	`object`	no	`—`	—
└`enabled` Enable or disable text safety checks. Defaults to true.	`boolean`	no	`true`	—
└`drive` Picsart Drive storage options. When provided, the result will be saved to the user's Drive.	`object`	no	`—`	—
└`name` Filename to save the result as in Picsart Drive.	`string`	yes	`—`	—
└`attributes` Additional file metadata attributes.	`object`	no	`—`	—
└`folder` Destination folder in Picsart Drive.	`object`	no	`—`	—

Response

Over HTTP the output arrives inside a status envelope, at response.result. ai.apis.run() unwraps that envelope for you and resolves to { result, usage } instead. Either way the result itself is the vendor's own shape.

json

{
  "result": {
    "timings": {},
    "seed": 0,
    "video": {
      "content_type": "image/png",
      "url": "https://cdn.picsart.com/…/result.mp4",
      "file_name": "z9RV14K95DvU.png",
      "file_size": 4404019
    },
    "source": {},
    "duration": 0,
    "expanded_prompt": "…"
  }
}

json

{
  "status": "success",
  "response": {
    "id": "wf_abc123",
    "status": "COMPLETED",
    "result": {
      "timings": {},
      "seed": 0,
      "video": {
        "content_type": "image/png",
        "url": "https://cdn.picsart.com/…/result.mp4",
        "file_name": "z9RV14K95DvU.png",
        "file_size": 4404019
      },
      "source": {},
      "duration": 0,
      "expanded_prompt": "…"
    }
  }
}

Tier	Rate
480p	$0.055 / sec
768p	$0.088 / sec
1080p	$0.176 / sec
2K	$0.352 / sec

MiniMaxMiniMax H3 Max Extend API

Params

Result

Other models from MiniMax

Install the SDK

Authenticate

Make a request

Async (submit & poll)

Parameters

Response

Overview

Make a request

Async (submit & poll)

Parameters

Response

Rates