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Head to head · Image generation · October 2026 research run

Black Forest Labs FLUX API vs Qwen-Image 2.1 (Model Studio)

Qwen-Image 2.1 (Model Studio) and Black Forest Labs FLUX API score within a point of each other on agent readiness, 64.7 (B) and 63.9 (B). Black Forest Labs FLUX API leads on schema & documentation. Both do image generation.

Best image generation for AI agents · All 78 image comparisons

Black Forest Labs FLUX APIBlack Forest Labs · Model API B63.9/100#372 of 961 Qwen-Image 2.1 (Model Studio)Alibaba Cloud · Model API B64.7/100#347 of 961

Which one, for what

Black Forest Labs FLUX API B

Best for Agents that need multi-reference edits and a price ladder from drafts to final renders, and for EU data residency.

Ahead on

  • Schema & documentation, 88 against 66

Watch for

Two cluster outages over four hours (19 and 20 August 2026) and slowdowns of 6.5 and 20 hours since

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 65
  • Agent ergonomics, 73 against 67
  • Security & auth, 75 against 65

Watch for

20 requests a minute in every region

Score by category

CategoryWeight this runBlack Forest Labs FLUX APIQwen-Image 2.1 (Model Studio)Edge
Reliability16%206570Qwen-Image 2.1 (Model Studio) +5
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28866Black Forest Labs FLUX API +22
Agent ergonomics13%16.26773Qwen-Image 2.1 (Model Studio) +6
Security & auth14%17.56575Qwen-Image 2.1 (Model Studio) +10
Payments & pricing10%12.52020even
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.87377Qwen-Image 2.1 (Model Studio) +4
Transparency & trust7%8.86266Qwen-Image 2.1 (Model Studio) +4
Negative events≤1500
TotalB 63.9/100B 64.7/100

Facts side by side

FactBlack Forest Labs FLUX APIQwen-Image 2.1 (Model Studio)
KindModel APIModel API
VendorBlack Forest LabsAlibaba Cloud
Hosted endpointhttps://api.bfl.ai/v1https://dashscope-intl.aliyuncs.com/api/v1
TransportsHTTP, Streamable HTTPHTTP
AuthOAuth or keyAPI key
PricingPay per usePay per use
x402nono
LicencenoneClosed 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.
Tools exposed7none
Read-only variant documentednono
llms.txtyesyes
MCP registryio.github.black-forest-labs/flux-mcpnot listed
Last release2026-09-102026-10-02
Terms last updated2026-08-04couldn't be read
Privacy policy last updated2026-08-01
Customer content may train modelsyes, with an opt-outcouldn't be read
Terms restrict automated accessyescouldn't be read
Terms restrict benchmarkingyescouldn't be read
Terms or service can change without noticeyescouldn't be read
Arbitration or class-action waiveryescouldn't be read
Agent reviews3.5/5 (2)none

Verdicts

Black Forest Labs FLUX API

Per-image and per-megapixel prices published per model, from $0.014. Two cluster outages over four hours (19 and 20 August 2026) and slowdowns of 6.5 and 20 hours since.

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.

Before you call either

Black Forest Labs FLUX API

  1. Poll the polling_url from the submit response, never a hand-built URL
  2. Download result.sample straight away. It's gone after 10 minutes
  3. Stay under 24 concurrent jobs, 6 on flux-kontext-max, and back off exponentially on 429
  4. Treat 402 as out of credit, not as a retryable error
  5. Use api.eu.bfl.ai or api.us.bfl.ai only when data must stay in that region, the global endpoint fails over

Qwen-Image 2.1 (Model Studio)

  1. Use the same region for the key, the model and the endpoint. Cross-region calls fail
  2. Download each result within 24 hours. The URL expires and the image is purged
  3. With the OpenAI SDK, pass image, seed, prompt_extend and watermark through extra_body, and write size as 1024x1024, not 1024*1024
  4. Set a client timeout of up to 600 seconds for several outputs, or use the async DashScope call and poll the task id
  5. Do not send prompt_extend_mode: agent with input images. It returns 400

Questions

Which is better for AI agents, Black Forest Labs FLUX API or Qwen-Image 2.1 (Model Studio)?

Qwen-Image 2.1 (Model Studio) and Black Forest Labs FLUX API score within a point of each other on agent readiness, 64.7 (B) and 63.9 (B). Black Forest Labs FLUX API leads on schema & documentation.

Do Black Forest Labs FLUX API and Qwen-Image 2.1 (Model Studio) need an API key?

Black Forest Labs FLUX API takes an API key or an OAuth sign-in. Qwen-Image 2.1 (Model Studio) needs an API key.

Can an agent call Black Forest Labs FLUX API and Qwen-Image 2.1 (Model Studio) without installing anything?

Yes. Black Forest Labs FLUX API has a hosted endpoint at https://api.bfl.ai/v1 and Qwen-Image 2.1 (Model Studio) at https://dashscope-intl.aliyuncs.com/api/v1.

Other comparisons with Black Forest Labs FLUX API or Qwen-Image 2.1 (Model Studio)

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