Inference Logoinference shell

Grok Imagine Video 1.5

Generate videos with xAI's Grok Imagine Video 1.5. Text-to-video, image-to-video and reference-to-video at 480p, 720p or 1080p, 1-15 seconds, with generated audio.

text to videoimage to videoreference to videonative audio
run in browser →run via APIrun with your agent
maker
xai
category
video
input → output
text → video, image → video, reference → video
runs via
api, javascript and python sdk, belt cli, mcp
updated
2026-11-06
price
$0.08/sec 480p, $0.14/sec 720p, $0.25/sec 1080p; $0.01/input image

api reference

about

generate videos with xai's grok imagine video 1.5. text-to-video, image-to-video and reference-to-video at 480p, 720p or 1080p, 1-15 seconds, with generated audio.

get an api key

create one in settings → api keys. the examples read it from INFERENCE_API_KEY.

bash
1export INFERENCE_API_KEY="inf_your_key"

1. calling the api

install the client

nothing to install. any http client works; the examples use curl, and jq to read responses. every response wraps its result in a data field.

run and get result

send "wait": true to hold the connection until the task finishes. without it the call returns right away with the task still running.

bash
12# "wait": true holds the connection until the task finishes.3# the response is {"data": {"id", "status", "status_text", "output", ...}}4curl -X POST https://api.inference.sh/apps/run \5  -H "Authorization: Bearer $INFERENCE_API_KEY" \6  -H "Content-Type: application/json" \7  -d '{8    "app": "xai/grok-imagine-video-1-5",9    "input": {10      "prompt": "A red fox trots through fresh snow at dawn, slow tracking shot"11    },12    "wait": true13  }'

stream live updates

get real-time progress updates as the task runs. ideal for showing progress bars, partial results, or long-running tasks. send "stream": true and the response is a server-sent event stream that ends when the task does.

bash
12# "stream": true answers with server-sent events until the task finishes3curl -N -X POST https://api.inference.sh/apps/run \4  -H "Authorization: Bearer $INFERENCE_API_KEY" \5  -H "Content-Type: application/json" \6  -d '{7    "app": "xai/grok-imagine-video-1-5",8    "input": {9      "prompt": "A red fox trots through fresh snow at dawn, slow tracking shot"10    },11    "stream": true12  }'

run in the background

start the task and get its id back right away, then check on it later. for long tasks, or when you'd rather be called back, see webhooks.

bash
1# without "wait" the call returns the task right away (status 1, "received")2TASK_ID=$(curl -s -X POST https://api.inference.sh/apps/run \3  -H "Authorization: Bearer $INFERENCE_API_KEY" \4  -H "Content-Type: application/json" \5  -d '{6    "app": "xai/grok-imagine-video-1-5",7    "input": {8      "prompt": "A red fox trots through fresh snow at dawn, slow tracking shot"9    }10  }' | jq -r '.data.id')1112# later: read its state. done when status is 10 (completed), 11 (failed) or 12 (cancelled)13curl -s https://api.inference.sh/tasks/$TASK_ID \14  -H "Authorization: Bearer $INFERENCE_API_KEY" | jq '.data | {status, status_text, output}'

2. authentication

the api uses api keys for authentication. see the authentication docs for detailed setup instructions.

3. files

file inputs are automatically handled by the sdk. you can pass local paths, urls, or base64 data.

automatic upload

pass urls directly or use data uris for inline content.

bash
1# pass URLs or data URIs as input values2curl -X POST https://api.inference.sh/apps/run \3  -H "Authorization: Bearer $INFERENCE_API_KEY" \4  -H "Content-Type: application/json" \5  -d '{6    "app": "xai/grok-imagine-video-1-5",7    "input": {8      "image": "https://example.com/image.png",9      "audio": "data:audio/mp3;base64,..."10    },11    "wait": true12  }'

manual upload

you can also upload files manually and use the returned url.

bash
1# 1. create the file: the response has an upload_url and the file's uri2FILE=$(curl -s -X POST https://api.inference.sh/files \3  -H "Authorization: Bearer $INFERENCE_API_KEY" \4  -H "Content-Type: application/json" \5  -d '{"files": [{"filename": "image.png", "content_type": "image/png"}]}')67# 2. PUT the bytes to upload_url8curl -X PUT "$(echo "$FILE" | jq -r '.data[0].upload_url')" \9  -H "Content-Type: image/png" \10  --data-binary @image.png1112# 3. pass the uri as an input value13echo "$FILE" | jq -r '.data[0].uri'

4. webhooks

get notified when a task completes by providing a webhook url. when the task reaches a terminal state (completed, failed, or cancelled), a POST request is sent to your url with the task result.

bash
1curl -X POST https://api.inference.sh/apps/run \2  -H "Authorization: Bearer $INFERENCE_API_KEY" \3  -H "Content-Type: application/json" \4  -d '{5    "app": "xai/grok-imagine-video-1-5",6    "input": {7        "prompt": "A red fox trots through fresh snow at dawn, slow tracking shot"8    },9    "webhook": "https://your-server.com/webhook"10  }'

webhook payload

your endpoint receives a JSON POST with the task result:

json
1{2  "event": "task.completed",3  "timestamp": "2024-01-15T10:30:05Z",4  "data": {5    "id": "task_abc123",6    "short_id": "abc123",7    "status": 10,8    "status_text": "completed",9    "output": { ... },10    "created_at": "2024-01-15T10:30:00Z",11    "updated_at": "2024-01-15T10:30:05Z"12  }13}
eventstringtask.completed, task.failed or task.cancelled
timestampstringiso timestamp of the delivery
data.idstringtask id
data.short_idstringshort task id
data.statusnumberterminal status (10=completed, 11=failed, 12=cancelled, 13=rejected)
data.status_textstringthe status as a word: completed, failed or cancelled
data.outputobjecttask output (when completed)
data.errorstringerror message (when failed, omitted otherwise)
data.session_idstringsession id (when the task ran in a session, omitted otherwise)
data.created_atstringiso timestamp
data.updated_atstringiso timestamp

5. schema

input

promptstring*

what happens in the video: subject, motion and camera. with reference images, refer to them as <image_0>, <image_1>, ...

example: "A red fox trots through fresh snow at dawn, slow tracking shot"
imagestring(file)

optional first frame. the video animates from this image and keeps its aspect ratio unless aspect_ratio is set.

reference_imagesarray

optional reference images for characters, objects or style. reference-to-video supports up to 720p.

durationinteger

video length in seconds (1-15).

default: 8min:1max:15
resolutionstring

output resolution. price per second: 480p $0.08, 720p $0.14, 1080p $0.25. 1080p is not available with reference images.

default: "480p"
options:"480p""720p""1080p"
aspect_ratiostring

aspect ratio. defaults to the first frame's ratio, or 16:9 without one. setting it with a first frame stretches the image.

options:"1:1""16:9""9:16""4:3""3:4""3:2""2:3"
generate_audioboolean

generate an audio track with the video.

default: true

output

moderatedboolean

true when xai content moderation withheld the generated video.

noticestring

set when xai content moderation withheld the video.

videostring(file)

the generated video. null when xai content moderation withheld it.

other video apps

Gemini Omni 1.2 Flash

google/gemini-omni-1-2-flash

$0.0232/sec 360p, $0.0695/sec 720p, $0.1043/sec 1080p, $0.2085/sec 4K, plus $1.50/M input and $9.00/M thinking tokens

VACE

pruna/vace

$0.40/video

P-Video-Animate

pruna/p-video-animate

$0.03/sec 720p, $0.06/sec 1080p

P-Video-Upscale

pruna/p-video-upscale

Std: $0.01/sec 720p, $0.02 1080p, $0.04 2k, $0.08 4k; high fps 2x

P-Video-2-Pro-Avatar

pruna/p-video-2-pro-avatar

$0.02/sec 480p, $0.04/sec 768p, $0.06/sec 1080p, $0.08/sec 2k, $0.12/sec 4k

more from xai

Grok Speech to Text

xai/grok-stt

$0.10/hr of audio for files, $0.20/hr for realtime

Grok Imagine Image 2.0

xai/grok-imagine-image-2-0

$0.04/img low 1k, $0.06/img low 2k, $0.06/img med 1k, $0.08/img med 2k; $0.01/source img (edits)

Grok 4.7

xai/grok-4-7

$2.00/M input, $0.50/M cached, $6.00/M output (2x at 200k+ prompt tokens)

Grok Build 0.1

xai/grok-build-0-1

$1.00/M input, $0.20/M cached, $2.00/M output (2x at 200k+ prompt tokens)

new models

  1. J

    JEV-9B

    autotrust/jev-9b

    decisionfrom $0.00055833/sec
  2. A

    AutoTrust-JEV-27B v1.1

    autotrust/jev-27b-v1-1

    decisionfrom $0.00055833/sec

  3. Gemini Omni 1.2 Flash

    google/gemini-omni-1-2-flash

    video$0.0232/sec 360p, $0.0695/sec 720p, $0.1043/sec 1080p, $0.2085/sec 4K, plus $1.50/M input and $9.00/M thinking tokens

  4. GPT Image 2.6 Flare

    openai/gpt-image-2-6-flare

    image$30.00/M output, $5.00/M text input, $8.00/M image input, $0.10/M SVG input, $0.50/M SVG output

  5. GPT Image 2.6 Sunburst

    openai/gpt-image-2-6-sunburst

    image$30.00/M out, $5.00/M text in, $8.00/M img in; SVG $0.10/$0.50/M in/out

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