Qwen Image 2.1 LoRA API

Introduction

Qwen Image 2.1 LoRA Editing applies your own LoRA weights while revising one to ten reference images. It is the same custom-weights setup as the text-to-image endpoint, pointed at work you already have rather than at a blank frame.

Choose a Qwen Image 2.1 LoRA mode by starting material

Key features

Bring a character LoRA to work already in progress

A LoRA you can only start new work with is far less useful than one you can apply to an approved frame. This endpoint takes both: up to ten references and up to three weight files in the same request.

Weights and references solve different halves of consistency

References hold composition, setting and the specific frame; the LoRA holds identity across every frame. Using both is steadier than leaning hard on either.

Request parameters

Pricing

Prices are in credits, the same credits you use on the website (1 credit = $0.01). The hold is taken when the task is accepted and settled to the actual charge when it finishes; failed tasks are refunded.

Each task is rounded up to whole credits, so one run at the lowest tier costs 7 credits per image ($0.07).

For an exact number before you run, send the same body to POST /jobs/quote.

Use cases

Applying a character LoRA to shots you already approved

The expensive part of a shoot is rarely the generation — it is arriving at a frame everyone signed off on. This endpoint lets you keep that frame and change who is in it: send the approved composition as a reference, load the character LoRA, and let the weights carry the identity while lighting, staging and crop stay exactly where they were.

Bringing a back catalogue into the current house style

Point a style LoRA at work generated months ago.

Scene work built from a reference you control

Start from a figure you already generated and add the second subject, the wardrobe or the setting.

Wardrobe and location swaps with the person held fixed

Two references — one carrying the person, one carrying the garment or the room — plus a character LoRA, and a prompt that says which source is which. Change the room, keep the face; change the outfit, keep both.

Prompt guide & pro tips

Name what every reference contributes before you name the change

The model does not infer roles from order or from filename. Write it out: "the first image is the woman, the second is the room she is standing in, the third is the coat." Without that sentence a multi-reference request blends the sources instead of editing with them, and the result looks like an averaging artefact rather than a mistake you can debug.

Do not let the prompt and the LoRA describe the same thing

When a character LoRA is loaded, describe the scene, the action and the light — not the face. Restating features the weights already encode pulls the render in two directions and usually produces something that resembles neither. Let the LoRA own identity and let the prompt own everything around it.

Verify a new LoRA changes something before trusting a batch

Weights built for a different base architecture can load with no error and have almost no visible effect. Run one deliberately obvious prompt against new weights, confirm the output moved, then queue the batch.

API quick start

Call the Qwen Image 2.1 LoRA API in three steps

1. Create an API key. Sign in to PopNow and create a key in the API console. Keys start with sk-popnow- and use the same credits as the website.
2. Send the request. POST /jobs/createTask with model alibaba/qwen-image-2.1-lora/edit and an input object that follows the parameter table. The response returns a task ID straight away.
3. Get the result. Poll GET /jobs/recordInfo with the task ID, or pass a callBackUrl and we post the result to it. Download the output links when the task succeeds.

# 1. Create the task. Keep the Idempotency-Key if you retry after a network error.
export IDEMPOTENCY_KEY="$(uuidgen)"
curl -X POST https://api.popnow.ai/api/v1/jobs/createTask \
  -H "Authorization: Bearer $POPNOW_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $IDEMPOTENCY_KEY" \
  -d '{
  "model": "alibaba/qwen-image-2.1-lora/edit",
  "input": {
    "prompt": "A ceramic teapot on a linen cloth, soft window light, muted palette",
    "image_urls": [
      "https://media.popnow.ai/influencer/examples/marco.webp"
    ],
    "aspect_ratio": "1:1",
    "resolution": "1k",
    "output_format": "jpeg"
  }
}'

# 2. Copy data.taskId from the response, then poll until state is succeeded, failed, canceled or expired.
TASK_ID="TASK_ID_FROM_RESPONSE"
curl "https://api.popnow.ai/api/v1/jobs/recordInfo?taskId=$TASK_ID" \
  -H "Authorization: Bearer $POPNOW_API_KEY"

Replace the prompt and any links with your own. The API tab has the response, polling and callback reference.

Qwen Image 2.1 LoRA API questions

All Qwen Image models

Plain Qwen Image 2.1 is cheaper when you don't need your own weights.

• Qwen Image 2.1 Pro APIUp to six detailed 2K images from one promptFrom 6 credits per image
• Qwen Image 2.1 Turbo APIFast 8-step renders, up to six per promptFrom 3 credits per image
• Qwen Image 2.1 APIOpen model with 2K output and transparent backgroundsFrom 4 credits per image
• Qwen Image 2.1 LoRA APIQwen Image 2.1 images and edits with up to three of your LoRAsFrom 5 credits per image
• Qwen Image 3.0 Pro APIFine typography plus lifelike skin, fabric and glassFrom 6 credits per image
• Qwen Image 3.0 APIReadable signs and headlines rendered into the imageFrom 5 credits per image
• Qwen Image 2 APISimple prompt-to-image and one-photo editsFrom 6 credits per image
• Qwen Image 2512 LoRA APIQwen Image 2512 renders and edits with your own LoRAsFrom 5 credits per image
• Qwen Image Edit 2509 LoRA APIMulti-photo Qwen edits that load your own LoRAsFrom 5 credits per image
• Qwen Image 1.0 LoRA APIOriginal Qwen-Image with clean lettering and your own LoRAsFrom 5 credits per image

Other image APIs

• Z-Image Base LoRA APIZ-Image Base with up to three of your own LoRAsFrom 3 credits per image
• MiniMax H3 Image LoRA APIH3 stills and edits with up to three of your LoRAsFrom 7 credits per image
• Anima Turbo LoRA APIAnime art with your own style or character LoRAsFrom 3 credits per image
• Krea 2 Turbo LoRA APIKrea 2 Turbo images and restyles with your own LoRAsFrom 4 credits per image
• P-Image LoRA APIFast P-Image renders and edits with one LoRA of your ownFrom 1 credit per image
• FLUX.2 Klein 9B LoRA APIFast FLUX.2 Klein 9B that loads up to three of your LoRAsFrom 3 credits per image

More about Qwen Image 2.1 LoRA

Try it

Qwen Image 2.1 LoRA AI Image Generator onlineCreate images with Qwen Image 2.1 LoRA in PopNow

Docs

Qwen Image 2.1 LoRA model ID and input schema in the API docsPopNow API quickstart: your first request in five minutesImage generation guide for the PopNow APIWebhooks: get Qwen Image 2.1 LoRA results without polling