Grok Imagine API

Grok Imagine API

Grok Imagine is xAI's image generation and editing API. It supports text-to-image, JSON-based image edits, multi-image edits, multi-turn refinement, batch variations, aspect-ratio control, 1k/2k resolution, URL output, and base64 output.

Use official xAI docs for exact current model availability and pricing when that matters. Do not recommend the deprecated grok-imagine-image-pro; migrate existing uses to grok-imagine-image-quality or the current documented Grok Imagine image model.

Quick start

Raw REST:

curl -X POST https://api.x.ai/v1/images/generations \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $XAI_API_KEY" \
  -d '{
    "model": "grok-imagine-image",
    "prompt": "A collage of London landmarks in a stenciled street-art style"
  }'

Python xAI SDK:

import xai_sdk

client = xai_sdk.Client()
response = client.image.sample(
    model="grok-imagine-image",
    prompt="A collage of London landmarks in a stenciled street-art style",
)
print(response.url)

OpenAI-compatible generation:

from openai import OpenAI

client = OpenAI(base_url="https://api.x.ai/v1", api_key="YOUR_API_KEY")
response = client.images.generate(
    model="grok-imagine-image",
    prompt="A collage of London landmarks in a stenciled street-art style",
)
print(response.data[0].url)

Integration choices

The OpenAI SDK's images.edit() is not supported for Grok Imagine edits because it sends multipart/form-data; xAI image edits require application/json.

Core workflow

1. Choose generation vs editing:
   • New image: POST /v1/images/generations, client.image.sample(), or images.generate().
   • Edit image: POST /v1/images/edits, xAI SDK sample(image_url=...), or Vercel AI SDK provider options.
2. Set model, prompt, and optional n, aspect_ratio, resolution, or output format.
3. For image edits, pass a public image URL or a base64 data URI. Up to 5 input images are supported.
4. Treat generated URLs as temporary. Download them promptly or request base64 output when embedding/saving directly.
5. Check moderation metadata when using xai_sdk; do not assume every request produces a usable image.

Common patterns

• Same prompt, multiple variants: use sample_batch(..., n=...) or images.generate(..., n=...).
• Different prompts in parallel: use xai_sdk.AsyncClient() with asyncio.gather().
• Single-image edit: output aspect ratio follows the input image.
• Multi-image edit: output aspect ratio follows the first input unless aspect_ratio is set.
• Base64 output: xAI SDK uses image_format="base64"; OpenAI-compatible SDKs use response_format="b64_json".
• Resolution values: 1k or 2k.
• Maximum images per request: 10.

Reference

See references/image-api.md for endpoint shapes, parameter names by SDK, editing payloads, aspect ratios, response handling, and troubleshooting.