Category: provider

Model Studio Qwen Image

Validation

mkdir -p output/alicloud-ai-image-qwen-image
python -m py_compile skills/ai/image/alicloud-ai-image-qwen-image/scripts/generate_image.py && echo "py_compile_ok" > output/alicloud-ai-image-qwen-image/validate.txt

Pass criteria: command exits 0 and output/alicloud-ai-image-qwen-image/validate.txt is generated.

Output And Evidence

Write generated image URLs, prompts, and metadata to output/alicloud-ai-image-qwen-image/.
Keep at least one sample JSON response per run.

Build consistent image generation behavior for the video-agent pipeline by standardizing image.generate inputs/outputs and using DashScope SDK (Python) with the exact model name.

Prerequisites

Install SDK (recommended in a venv to avoid PEP 668 limits):

python3 -m venv .venv
. .venv/bin/activate
python -m pip install dashscope

Set DASHSCOPE_API_KEY in your environment, or add dashscope_api_key to ~/.alibabacloud/credentials (env takes precedence).

Critical model names

Use one of these exact model strings:

qwen-image
qwen-image-plus
qwen-image-max
qwen-image-2.0
qwen-image-2.0-pro
qwen-image-max-2025-12-30
qwen-image-plus-2026-01-09

Normalized interface (image.generate)

Request

prompt (string, required)
negative_prompt (string, optional)
size (string, required) e.g. 1024*1024, 768*1024
style (string, optional)
seed (int, optional)
reference_image (string | bytes, optional)

Response

image_url (string)
width (int)
height (int)
seed (int)

Quickstart (normalized request + preview)

Minimal normalized request body:

{
  "prompt": "a cinematic portrait of a cyclist at dusk, soft rim light, shallow depth of field",
  "negative_prompt": "blurry, low quality, watermark",
  "size": "1024*1024",
  "seed": 1234
}

Preview workflow (download then open):

curl -L -o output/alicloud-ai-image-qwen-image/images/preview.png "<IMAGE_URL_FROM_RESPONSE>" && open output/alicloud-ai-image-qwen-image/images/preview.png

Local helper script (JSON request -> image file):

python skills/ai/image/alicloud-ai-image-qwen-image/scripts/generate_image.py \\
  --request '{"prompt":"a studio product photo of headphones","size":"1024*1024"}' \\
  --output output/alicloud-ai-image-qwen-image/images/headphones.png \\
  --print-response

Parameters at a glance

Field	Required	Notes
`prompt`	yes	Describe a scene, not just keywords.
`negative_prompt`	no	Best-effort, may be ignored by backend.
`size`	yes	`WxH` format, e.g. `10241024`, `7681024`.
`style`	no	Optional stylistic hint.
`seed`	no	Use for reproducibility when supported.
`reference_image`	no	URL/file/bytes, SDK-specific mapping.

Quick start (Python + DashScope SDK)

Use the DashScope SDK and map the normalized request into the SDK call. Note: For qwen-image-max, the DashScope SDK currently succeeds via ImageGeneration (messages-based) rather than ImageSynthesis. If the SDK version you are using expects a different field name for reference images, adapt the input mapping accordingly.

import os
from dashscope.aigc.image_generation import ImageGeneration

# Prefer env var for auth: export DASHSCOPE_API_KEY=...
# Or use ~/.alibabacloud/credentials with dashscope_api_key under [default].


def generate_image(req: dict) -> dict:
    messages = [
        {
            "role": "user",
            "content": [{"text": req["prompt"]}],
        }
    ]

    if req.get("reference_image"):
        # Some SDK versions accept {"image": <url|file|bytes>} in messages content.
        messages[0]["content"].insert(0, {"image": req["reference_image"]})

    response = ImageGeneration.call(
        model=req.get("model", "qwen-image-max"),
        messages=messages,
        size=req.get("size", "1024*1024"),
        api_key=os.getenv("DASHSCOPE_API_KEY"),
        # Pass through optional parameters if supported by the backend.
        negative_prompt=req.get("negative_prompt"),
        style=req.get("style"),
        seed=req.get("seed"),
    )

    # Response is a generation-style envelope; extract the first image URL.
    content = response.output["choices"][0]["message"]["content"]
    image_url = None
    for item in content:
        if isinstance(item, dict) and item.get("image"):
            image_url = item["image"]
            break
    return {
        "image_url": image_url,
        "width": response.usage.get("width"),
        "height": response.usage.get("height"),
        "seed": req.get("seed"),
    }

Error handling

Error	Likely cause	Action
401/403	Missing or invalid `DASHSCOPE_API_KEY`	Check env var or `~/.alibabacloud/credentials`, and access policy.
400	Unsupported size or bad request shape	Use common `WxH` and validate fields.
429	Rate limit or quota	Retry with backoff, or reduce concurrency.
5xx	Transient backend errors	Retry with backoff once or twice.

Output location

Default output: output/alicloud-ai-image-qwen-image/images/
Override base dir with OUTPUT_DIR.

Operational guidance

Store the returned image in object storage and persist only the URL in metadata.
Cache results by (prompt, negative_prompt, size, seed, reference_image hash) to avoid duplicate costs.
Add retries for transient 429/5xx responses with exponential backoff.
Some backends ignore negative_prompt, style, or seed; treat them as best-effort inputs.
If the response contains no image URL, surface a clear error and retry once with a simplified prompt.

Size notes

Use WxH format (e.g. 1024*1024, 768*1024).
Prefer common sizes; unsupported sizes can return 400.

Anti-patterns

Do not invent model names or aliases; use official model IDs only.
Do not store large base64 blobs in DB rows; use object storage.
Do not omit user-visible progress for long generations.

Workflow

Confirm user intent, region, identifiers, and whether the operation is read-only or mutating.
Run one minimal read-only query first to verify connectivity and permissions.
Execute the target operation with explicit parameters and bounded scope.
Verify results and save output/evidence files.

References

See references/api_reference.md for a more detailed DashScope SDK mapping and response parsing tips.
See references/prompt-guide.md for prompt patterns and examples.
For edit workflows, use skills/ai/image/alicloud-ai-image-qwen-image-edit/.
Source list: references/sources.md