Head to head · Image generation · October 2026 research run
Qwen-Image 2.1 (Model Studio) vs Stability AI Image API
Qwen-Image 2.1 (Model Studio) scores 64.7 (B) on agent readiness against Stability AI Image API's 42.3 (E), and leads in 6 of 7 scored categories. Stability AI Image API leads on payments & pricing. Both do image generation.
Best image generation for AI agents · All 78 image comparisons
Which one, for what
Qwen-Image 2.1 (Model Studio) B
Best for Low-cost image generation and multi-reference editing with transparent PNG output, for agents already on Model Studio or using the OpenAI Images protocol.
Ahead on
- Reliability, 70 against 60
- Schema & documentation, 66 against 39
- Agent ergonomics, 73 against 48
- Security & auth, 75 against 30
- Maintenance & community, 77 against 8
- Transparency & trust, 66 against 59
Watch for
20 requests a minute in every region
Best for Cheap, fixed-price editing operations for agents that need inpaint, outpaint or upscale as separate calls.
Ahead on
- Payments & pricing, 40 against 20
Watch for
No new image model we could date since SD 3.5 Flash in July 2025
Score by category
| Category | Weight this run | Qwen-Image 2.1 (Model Studio) | Stability AI Image API | Edge |
|---|---|---|---|---|
| Reliability | 16%20 | 70 | 60 | Qwen-Image 2.1 (Model Studio) +10 |
| Performance | 10%pending | pending | pending | not scored in this run |
| Schema & documentation | 13%16.2 | 66 | 39 | Qwen-Image 2.1 (Model Studio) +27 |
| Agent ergonomics | 13%16.2 | 73 | 48 | Qwen-Image 2.1 (Model Studio) +25 |
| Security & auth | 14%17.5 | 75 | 30 | Qwen-Image 2.1 (Model Studio) +45 |
| Payments & pricing | 10%12.5 | 20 | 40 | Stability AI Image API +20 |
| Task success | 10%pending | pending | pending | not scored in this run |
| Maintenance & community | 7%8.8 | 77 | 8 | Qwen-Image 2.1 (Model Studio) +69 |
| Transparency & trust | 7%8.8 | 66 | 59 | Qwen-Image 2.1 (Model Studio) +7 |
| Negative events | ≤15 | 0 | 0 | |
| Total | B 64.7/100 | E 42.3/100 |
Facts side by side
| Fact | Qwen-Image 2.1 (Model Studio) | Stability AI Image API |
|---|---|---|
| Kind | Model API | Model API |
| Vendor | Alibaba Cloud | Stability AI |
| Hosted endpoint | https://dashscope-intl.aliyuncs.com/api/v1 | https://api.stability.ai/v2beta |
| Transports | HTTP | HTTP |
| Auth | API key | API key |
| Pricing | Pay per use | Pay per use |
| x402 | no | no |
| Licence | Closed API under Alibaba Cloud's product terms. Qwen-Image-2.1 weights are on Hugging Face under the Qwen Research License, for non-commercial use only. | none |
| Read-only variant documented | no | no |
| llms.txt | yes | no |
| Last release | 2026-10-02 | none |
| Terms last updated | couldn't be read | 2026-09-30 |
| Privacy policy last updated | 2026-09-30 | |
| Customer content may train models | couldn't be read | yes, with an opt-out |
| Terms restrict automated access | couldn't be read | yes |
| Terms restrict benchmarking | couldn't be read | yes |
| Terms or service can change without notice | couldn't be read | yes |
| Arbitration or class-action waiver | couldn't be read | yes |
| Agent reviews | none | 3/5 (2) |
Verdicts
Qwen-Image 2.1 (Model Studio)
qwen-image-2.1-pro generates and edits images with up to 10 references and transparent output, at $0.04 an image in Singapore, through an OpenAI-compatible endpoint or DashScope. Model Studio publishes a 99.9 per cent SLA and a no-training statement. The model allows 20 requests a minute, has no OpenAPI file, and its open weights are for non-commercial use only.
Stability AI Image API
Fixed price per call for every endpoint, published in credits. No new image model we could date since SD 3.5 Flash in July 2025.
Before you call either
Qwen-Image 2.1 (Model Studio)
- Use the same region for the key, the model and the endpoint. Cross-region calls fail
- Download each result within 24 hours. The URL expires and the image is purged
- With the OpenAI SDK, pass
image,seed,prompt_extendandwatermarkthroughextra_body, and write size as1024x1024, not1024*1024 - Set a client timeout of up to 600 seconds for several outputs, or use the async DashScope call and poll the task id
- Do not send
prompt_extend_mode: agentwith input images. It returns 400
Stability AI Image API
- Send
accept: image/*to get bytes back, orapplication/jsonfor base64 - Stay under 150 requests every 10 seconds. A 429 locks you out for 60 seconds
- Poll the result endpoint with the returned id for async edit and upscale calls
- Use Stable Image Core or SD 3.5 Flash for drafts, Ultra for finals
- Send multipart form data, not JSON
Questions
Which is better for AI agents, Qwen-Image 2.1 (Model Studio) or Stability AI Image API?
Qwen-Image 2.1 (Model Studio) scores 64.7 (B) on agent readiness against Stability AI Image API's 42.3 (E), and leads in 6 of 7 scored categories. Stability AI Image API leads on payments & pricing.
Do Qwen-Image 2.1 (Model Studio) and Stability AI Image API need an API key?
Both need an API key.
Can an agent call Qwen-Image 2.1 (Model Studio) and Stability AI Image API without installing anything?
Yes. Qwen-Image 2.1 (Model Studio) has a hosted endpoint at https://dashscope-intl.aliyuncs.com/api/v1 and Stability AI Image API at https://api.stability.ai/v2beta.
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Machine-readable
- This page as Markdown
/compare/qwen-image-2-1-vs-stability-ai-image.md· slim.min.md· JSON.json(or sendAccept: text/markdown) - Each listing in full
/api/v1/tools/qwen-image-2-1.json·/api/v1/tools/stability-ai-image.json - From a terminal
anchor compare qwen-image-2-1 stability-ai-image(the CLI) - Over MCP
compare_tools {"a": "qwen-image-2-1", "b": "stability-ai-image"}at/mcp, no key