Image generation models

Openference exposes image models on POST /v1/images/generations. Use the model ids below in your request body. Aliases are also accepted (e.g. agnes-image-2.5-flash → Agnes-Image-2.5-Flash).

Agnes Image 2.5 Flash (`agnes-image-2.5-flash`)

Task: text-to-image and image editing
Status: Active

Parameter	Default	Range / notes
`prompt`	—	Required
`size`	`"1K"`	Resolution tier: `"1K"`, `"2K"`, `"3K"`, `"4K"`
`ratio`	`"1:1"`	Aspect ratio: `"1:1"`, `"16:9"`, `"4:3"`, `"3:4"`, `"9:16"`, `"21:9"`, `"2:3"`, `"3:2"`

curl https://api.openference.com/v1/images/generations \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "agnes-image-2.5-flash",
    "prompt": "A modern architectural villa in the mountains at twilight",
    "size": "2K",
    "ratio": "16:9"
  }'

Retired models

Notice: The following models are currently inactive/retired:

sdxl-lightning (SDXL Lightning)

sdxl-base (SDXL Base 1.0)

Errors

HTTP	Code	Meaning
400	`invalid_num_steps`	`num_steps` out of range for the model

See POST /v1/images/generations and Common errors for the full list.