Which Sume image models can't edit? Five text-to-image-only rows

Five Sume image models cannot edit or take references: Soul (higgsfield-soul), Imagen 4 Fast (imagen-4-fast), Imagen 4 Ultra (imagen-4-ultra), Recraft V4 (recraft-v4) and Qwen Image Max (qwen-image-max). In the catalog their image_edit flag is false, and the four with a constraint note say image_urls are not accepted. The other fourteen image rows accept edits or references.

The data is from the image router catalog in Sume's repo, read 2026-10-03. Sume's Image API docs add that a request setting a parameter the model does not list is rejected with 400 unsupported_parameter, so these rows fail fast on a reference.

The five rows

Soul's price is the authenticated Higgsfield estimate for the Sume account, not a published tariff, according to the catalog note. All list prices are before the catalog's times 1.25 rule.

What to use when you need an edit

Match the replacement to the reason you picked the text-only row:

• Wanted Qwen quality with references: use qwen-image ($0.02 list), which lists edits.
• Wanted a source photo in the loop: no Imagen row edits; Nano Banana 2 and Pro list edit support and a 0.5K to 4K tier.
• Wanted Recraft-style graphics: Recraft V4 is text only here, so build the graphic first and edit it in a row that takes references.
• Wanted fine control of a region: ChatGPT Image 2.5 lists an optional mask_url.

When text-only is the right call

A reference-free row is a fine choice for concept art, backdrops and first drafts, where there is no source picture to preserve. Qwen Image Max at $0.075 list is the priciest of the five, and Soul at $0.004 is the cheapest by a wide margin, so the five rows span almost a twentyfold price range.

Because none of them accepts references, they also cannot be fed a previous output for a second pass. If your workflow loops (generate, then refine), start on a row that takes image_urls.

What Sume does and does not do

Read GET /v1/images/models for the live flags; rows are added over time.

• Does: list image_edit per model so you can filter before you send.
• Does: return 400 unsupported_parameter when a parameter is not listed.
• Does not: serve a reference-guided result from these five rows.