Generate Image

Use GLM-Image series models to generate high-quality images from text prompts. Through quick and accurate understanding of user text descriptions, AI image expression becomes more precise and personalized.

POST /paas/v4/images/generations

Generate Image

cURL

curl --request POST \
  --url https://api.z.ai/api/paas/v4/images/generations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "model": "glm-image",
  "prompt": "A cute little kitten sitting on a sunny windowsill, with the background of blue sky and white clouds.",
  "size": "1280x1280"
}
'

200

{
  "created": 1760335349,
  "data": [
    {
      "url": "<string>"
    }
  ],
  "content_filter": [
    {
      "role": "assistant",
      "level": 1
    }
  ]
}

Authorizations

Authorization · string · header · required

Use the following format for authentication: Bearer

Body

application/json

model · enum<string> · required

Model code

Available options: glm-image, cogview-4-250304

Example:

"glm-image"

prompt · string · required

The text description of the image to be generated.

Example:

"A cute little kitten."

quality · enum<string> · default: hd

The quality of the generated image. glm-image default is hd, others model is standard. hd: Generates a more detailed and rich image with higher overall consistency, but takes about 20 seconds. standard: Generates an image quickly, suitable for scenarios with higher requirements for generation speed, takes about 5-10 seconds.

Available options: hd, standard

size · string · default: 1280x1280

Image size. glm-image recommended enum values: 1280x1280 (default), 1568x1056, 1056x1568, 1472x1088, 1088x1472, 1728x960, 960x1728. Custom parameter: Both width and height must be between 1024px-2048px, and must be divisible by 32, and the maximum pixel count must not exceed 2^22px. Others model recommended enum values: 1024x1024 (default), 768x1344, 864x1152, 1344x768, 1152x864, 1440x720, 720x1440. Custom parameter: Both width and height must be between 512px-2048px, and must be divisible by 16, and the maximum pixel count must not exceed 2^21px.

Example:

"1280x1280"

user_id · string

Unique ID of the end user, helping the platform intervene in illegal activities, inappropriate content generation, or other abuses. ID length: 6 to 128 characters.

Required string length: 6 - 128

Response

200

application/json

Processing successful

created · integer

Request creation time, in Unix timestamp format, unit is seconds.

Example:

1760335349

data · object[]

Array, containing the generated image URL. Currently, the array only contains one image.

Hide child attributes

data. url · string · required

Image link. The temporary link expires after 30 days, please store it promptly.

content_filter · object[]

Array, containing content safety related information.

Hide child attributes

content_filter. role · enum<string>

Safety enforcement stage, including role = assistant model inference, role = user user input, role = history historical context.

Available options: assistant, user, history

content_filter. level · integer

Severity level level 0-3, level 0 is most severe, 3 is least severe.

Required range: 0 <= x <= 3