GPT Image 2.5: how many images can I generate per request?

You can generate up to 4 images per request with GPT Image 2.5 on Sume: the catalog lists n as 1 to 4 for the model, even though the request schema accepts up to 10 for any model. Each image is billed, so n: 4 costs four times one image at the same size and quality.

From Sume's Image API docs and its catalog code, read 2026-09-29.

How do I ask for four versions?

curl -X POST "https://api.sume.com/v1/images" \
  -H "Authorization: Bearer $SUME_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "openai/gpt-image-2.5",
    "prompt": "logo concept: a fox made of folded paper, flat colors",
    "n": 4,
    "quality": "low",
    "image_size": "1024x1024"
  }'

What limits apply?

Is it cheaper to draft at low quality?

Cost follows output tokens, and low uses far fewer than high at the same size. A common pattern is four low drafts, then one high render of the winner. See the price table for your size.