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grok-media

Original：🇺🇸 English

Translated

xAI Grok image and video generation guide covering authentication, endpoints, prompt structure, image editing, reference-image video, and async polling.

2installs

Sourcecalesthio/openmontage

Added on2026-08-15

NPX Install

npx skill4agent add calesthio/openmontage grok-media

Tags

Translated version includes tags in frontmatter

xai-grok image-generation video-generation api-guide prompt-engineering

SKILL.md Content

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Grok Media

Use this skill when working with xAI media models in OpenMontage.

Models

```
grok-imagine-image
```
for image generation and image editing
```
grok-imagine-video
```
for text-to-video, image-to-video, and reference-image video

Authentication

Env var:
```
XAI_API_KEY
```
Base URL:
```
https://api.x.ai/v1
```
Header:
```
Authorization: Bearer $XAI_API_KEY
```

Image API

Text-to-image

Endpoint:
```
POST /images/generations
```
Core fields:
- ```
model
```
- ```
prompt
```
- ```
n
```
- ```
aspect_ratio
```
- ```
resolution
```

Image edit

Endpoint:
```
POST /images/edits
```
Use
```
image
```
for one source image
Use
```
images
```
for multi-image compositing
Each source image can be:
- a public HTTPS URL
- a base64 data URI

Image prompting

Grok responds well to direct natural language
For edits, describe only the intended change and preserve everything else implicitly
For multi-image merges, explicitly name how each source contributes
Prefer one strong scene description over long style-stacking

Video API

Generation

Endpoint:
```
POST /videos/generations
```
Polling endpoint:
```
GET /videos/{request_id}
```
Success state:
```
status == "done"
```
Failure states to handle explicitly:
```
failed
```
,
```
expired
```

Modes

Text-to-video:
- prompt-only generation
Image-to-video:
- use
```
image: {"url": ...}
```
- this anchors the starting frame
Reference-to-video:
- use
```
reference_images: [{"url": ...}, ...]
```
- this influences who/what appears in the video without locking the first frame
- prompts can reference inputs with placeholders like
```
<IMAGE_1>
```
  ,
```
<IMAGE_2>
```

Video constraints

Grok video is best treated as short-form generation
Current output resolutions are
```
480p
```
and
```
720p
```
Reference-image video supports multiple images and is useful for product placement, wardrobe transfer, and identity consistency
Download outputs promptly; provider URLs may be temporary

Pricing

```
grok-imagine-image
```
:
```
$0.02
```
per generated image
```
grok-imagine-image
```
edits/composites: add
```
$0.002
```
per input image
```
grok-imagine-video
```
:
- ```
480p
```
  :
```
$0.05
```
  per second
- ```
720p
```
  :
```
$0.07
```
  per second
```
grok-imagine-video
```
image-conditioned requests: add
```
$0.002
```
per input image

Grok-Specific Prompt Guidance

Images

Start with subject, action, setting
Add one style anchor, not five
For edits:
- describe the desired modification
- keep the rest of the image stable by omission, not by writing a giant preservation list

Video

Keep prompts scene-local: one shot, one main motion idea, one emotional beat
For reference-conditioned video, explicitly map source images to roles:
- person from
```
<IMAGE_1>
```
- jacket from
```
<IMAGE_2>
```
- product from
```
<IMAGE_3>
```
Camera and pacing language helps:
- slow push-in
- handheld follow
- locked-off medium shot
- high-energy whip pan transition

Good Fits

Image style transfer
Image compositing from multiple sources
Reference-conditioned short video
Product-led motion clips
Character-consistent scenes without hard first-frame lock

Weak Fits

Long-form clip generation
Heavy reliance on deterministic seeds
Overloaded prompts with multiple scene changes

Failure Handling

If generation submission succeeds but polling expires, surface it as a provider/runtime issue
If a request fails, preserve the endpoint, mode, and prompt summary in the error
Do not silently substitute a different provider after xAI was selected without user approval