MiniMax H3 Max

POST https://api.beatapi.io/v1/videos/tasks

A post-trained H3 tuned for prompt adherence. Text or first and last frames, at 480P or 768P.

Supported modes

Async flow: Create the task, save data.id, then poll the Task with GET /v1/tasks/{task_id}. On succeeded, read data.output.media. On failed, read data.error_code and data.error_message, then follow the error and retry policy.

Using a local file? upload a local input first and pass the returned data.url.

Authorization

Authorization   string   required

Send your BeatAPI API key as a Bearer token. Create one on the Dashboard.

Authorization: Bearer <BEATAPI_API_KEY>

Keep permanent API keys on trusted servers. Content-Type: application/json is required for the request body. Idempotency-Key is optional when the endpoint exposes it and is recommended for safe retries with the exact same body.

Request body

model   string   required

Must be minimax-h3-max.

Value: minimax-h3-max

prompt   string   required

What should happen in the shot — the motion, the expression, the camera.

Length: 1 to 5000 characters

images   string[]   optional

Public HTTPS images. One starts the render from a first frame; a second becomes the last frame, in first-to-last order.

Count: 1 to 2 items

duration   integer   optional

Requested output duration in seconds. Billed per second at the rate for the chosen resolution. If a duration is unsupported, the API returns 400.

Default: 5
Range: x >= 1

resolution   enum<string>   optional

Output resolution. Upper-case P, and the only two values this model accepts. Price scales with it.

Available options: 480P, 768P
Default: "768P"

seed   integer   optional

Reuse a seed to re-render the same motion. A random seed is chosen when omitted.

Range: x >= 0

Request examples

Text to video

$
curl --request POST \
>
  --url https://api.beatapi.io/v1/videos/tasks \
>
  --header 'Authorization: Bearer <BEATAPI_API_KEY>' \
>
  --header 'Content-Type: application/json' \
>
  --data '{
>
  "model": "minimax-h3-max",
>
  "prompt": "A slow cinematic push through a misty mountain village at dawn.",
>
  "duration": 5,
>
  "resolution": "768P"
>
}'

First frame

$
curl --request POST \
>
  --url https://api.beatapi.io/v1/videos/tasks \
>
  --header 'Authorization: Bearer <BEATAPI_API_KEY>' \
>
  --header 'Content-Type: application/json' \
>
  --data '{
>
  "model": "minimax-h3-max",
>
  "prompt": "The performer turns toward the camera as neon light sweeps across the scene.",
>
  "images": [
>
    "https://media.beatapi.io/samples/neon-singer.png"
>
  ],
>
  "duration": 5,
>
  "resolution": "768P"
>
}'

First and last frames

$
curl --request POST \
>
  --url https://api.beatapi.io/v1/videos/tasks \
>
  --header 'Authorization: Bearer <BEATAPI_API_KEY>' \
>
  --header 'Content-Type: application/json' \
>
  --data '{
>
  "model": "minimax-h3-max",
>
  "prompt": "Move smoothly from the opening portrait to the final product reveal.",
>
  "images": [
>
    "https://media.beatapi.io/samples/neon-singer.png",
>
    "https://media.beatapi.io/samples/smart-bottle.png"
>
  ],
>
  "duration": 5,
>
  "resolution": "480P"
>
}'

Response

A successful request returns HTTP 201.

1
{
2
  "data": {
3
    "id": "task_8K2qA",
4
    "object": "task",
5
    "task_kind": "video",
6
    "capability_id": "minimax-h3-max",
7
    "capability_version": null,
8
    "media_type": "video",
9
    "model": "minimax-h3-max",
10
    "status": "queued",
11
    "stage": "queued",
12
    "created_at": 1782210000,
13
    "updated_at": 1782210000,
14
    "completed_at": null,
15
    "output": null,
16
    "usage": {
17
      "credits_reserved": 0.4,
18
      "credits_charged": 0.4,
19
      "billable_duration_seconds": 5,
20
      "credits_settled": 0,
21
      "credits_refunded": 0
22
    },
23
    "request_id": "req_abc123",
24
    "error_code": null,
25
    "error_message": null
26
  }
27
}

Errors