200 SKU product images on GPT Image 2.5: low $2, medium $4, high $14

Two hundred product images on GPT Image 2.5 through Sume cost about $2.00 at quality: low (1 cent each), $4.00 at medium (2 cents) and $14.00 at high (7 cents, for 1024-class output), before any retries (read 2026-10-08). GPT Image 2.5 shipped as ChatGPT Images 2.5 on 2026-09-08, and Sume lists it as openai/gpt-image-2.5 (Flare) and openai/gpt-image-2.5-sunburst.

How the per-image price is made

Sume bills the catalog list price times 1.25 and rounds up to a whole cent per request. The catalog list for gpt-image-2.5 is the high-quality 1024 output at $0.0527, so high is $0.0527 x 1.25 = $0.0659, which rounds up to 7 cents. Sume's catalog data (read 2026-10-08) puts low at 1 cent and medium at 2 cents at 1024-class sizes. Admission also counts estimated input tokens, so a request with many reference images can reserve more than the display rate.

What the model accepts for catalog work

GPT Image 2.5 accepts up to 16 image references, an optional mask_url, and background: auto|transparent|opaque. If you omit quality the default is high, so a catalog job that forgets the field costs 7 cents, not 1. auto quality reserves max, so set low or medium explicitly for bulk work.

Custom pixel sizes need both edges to be multiples of 16, a longest edge of 3,840, a ratio of at most 3:1, and between 655,360 and 8,294,400 pixels.

• Default quality when omitted: high
• auto quality reserves max
• Up to 16 image references; optional mask

A low-cost loop

Generate one image per SKU at low quality, keep the ones that pass your review, and re-run only the keepers at high. If one in four needs the upgrade, 200 x 1 cent + 50 x 7 cents = $5.50 against $14.00 for all-high. Review the low drafts for label text and edges before you spend the 7 cents.

curl -X POST https://api.sume.com/v1/images \
  -H "Authorization: Bearer $SUME_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: sku-0001-draft" \
  -d '{
    "model": "openai/gpt-image-2.5",
    "prompt": "Product on a seamless white background, soft shadow, centered, packshot",
    "quality": "low"
  }'