Qwen Image 2.1 Pro: what exists, and which Qwen ids Sume lists

There is a Qwen-Image 2.1 model card on Hugging Face, and the page I read documents no "Pro" variant. Sume's Image API does not list Qwen-Image 2.1 either. It lists two Qwen models, qwen/qwen-image and qwen/qwen-image-max, so if you searched for "Qwen Image 2.1 Pro" and want a hosted Qwen on Sume, those two are the ids to try.

What the model card documents

The Qwen-Image-2.1 card describes a model with 7B parameters in its visual generation component, text-to-image and editing in one model, and up to 10 reference images. It lists a maximum output of 2752x1536 pixels at 16:9 and seven standard ratios from 1:1 to 9:16. Its license is the Qwen Research License Agreement. Third-party pages mention a Pro variant, but I could not confirm it on the vendor page, so I do not describe it here.

Calling a Qwen model on Sume

Pick one of the two ids and read its catalog row for the exact ratios, quality values and reference range, since each model accepts only what its descriptors list. Anything outside them returns 400 unsupported_parameter instead of being dropped.

curl "https://api.sume.com/v1/images/models/qwen/qwen-image-max/endpoints" \
  -H "Authorization: Bearer $SUME_API_KEY"

curl -X POST "https://api.sume.com/v1/images" \
  -H "Authorization: Bearer $SUME_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"qwen/qwen-image-max","prompt":"product shot of a bamboo toothbrush on a stone ledge, soft morning light","aspect_ratio":"16:9"}'

If you need the 2.1 weights

The Qwen-Image-2.1 checkpoint is downloadable under its research license. If you want exactly that checkpoint, run it on your own hardware and check the license for commercial use first. Sume does not serve it, and the docs do not promise that a given Qwen id maps to a specific upstream release.

Choosing among the options

Use qwen/qwen-image-max when you want the larger of the two Qwen entries and are happy to read the catalog for its limits. Use sume/auto if you do not care which family runs; Sume never discloses which one served an auto request. Pin a model id when you need repeatable looks across a batch.

How to confirm what is live

Do not trust any post, including this one, over the live catalog:

• GET /v1/images/models lists the ids that exist today.
• The endpoint record shows the price and the descriptors.
• A retired id keeps working and runs as its successor, so check the job's stored model.