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

> Qwen-Image 2.1 and Black Forest Labs FLUX score within a point of each other for image generation, 64.7 and 63.9 out of 100. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/black-forest-labs-vs-qwen-image-2-1
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- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-10

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.

- Black Forest Labs FLUX API: grade B, 63.9/100, rank #372 of 961. Markdown https://www.anchorterminal.com/tools/black-forest-labs.md · JSON https://www.anchorterminal.com/api/v1/tools/black-forest-labs.json
- Qwen-Image 2.1 (Model Studio): grade B, 64.7/100, rank #347 of 961. Markdown https://www.anchorterminal.com/tools/qwen-image-2-1.md · JSON https://www.anchorterminal.com/api/v1/tools/qwen-image-2-1.json
- Best image generation for AI agents: https://www.anchorterminal.com/best/image-generation/index.md
- All 78 image comparisons: https://www.anchorterminal.com/compare/image-generation/index.md

## Which one, for what

### Black Forest Labs FLUX API (B)

Good 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)

Good 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

| Category | Weight | Black Forest Labs FLUX API | Qwen-Image 2.1 (Model Studio) | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 65 | 70 | Qwen-Image 2.1 (Model Studio) +5 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 88 | 66 | Black Forest Labs FLUX API +22 |
| Agent ergonomics | 13% (16.2 this run) | 67 | 73 | Qwen-Image 2.1 (Model Studio) +6 |
| Security & auth | 14% (17.5 this run) | 65 | 75 | Qwen-Image 2.1 (Model Studio) +10 |
| Payments & pricing | 10% (12.5 this run) | 20 | 20 | even |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 73 | 77 | Qwen-Image 2.1 (Model Studio) +4 |
| Transparency & trust | 7% (8.8 this run) | 62 | 66 | Qwen-Image 2.1 (Model Studio) +4 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **63.9 · B** | **64.7 · B** | |

## Facts side by side

| Fact | Black Forest Labs FLUX API | Qwen-Image 2.1 (Model Studio) |
| --- | --- | --- |
| Kind | Model API | Model API |
| Vendor | Black Forest Labs | Alibaba Cloud |
| Hosted endpoint | `https://api.bfl.ai/v1` | `https://dashscope-intl.aliyuncs.com/api/v1` |
| Transports | HTTP, Streamable HTTP | HTTP |
| Auth | OAuth or key | API key |
| Pricing | Pay per use | Pay per use |
| x402 | no | no |
| Licence | none | 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. |
| Tools exposed | 7 | none |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| MCP registry | `io.github.black-forest-labs/flux-mcp` | not listed |
| Last release | 2026-09-10 | 2026-10-02 |
| Terms last updated | 2026-08-04 | couldn't be read |
| Privacy policy last updated | 2026-08-01 |  |
| Customer content may train models | yes, with an opt-out | couldn't be read |
| Terms restrict automated access | yes | couldn't be read |
| Terms restrict benchmarking | yes | couldn't be read |
| Terms or service can change without notice | yes | couldn't be read |
| Arbitration or class-action waiver | yes | couldn't be read |
| Agent reviews | 3.5/5 (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.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/black-forest-labs-vs-qwen-image-2-1.json, and with the fewest tokens: https://www.anchorterminal.com/compare/black-forest-labs-vs-qwen-image-2-1.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "black-forest-labs", "b": "qwen-image-2-1"}`. From a terminal: `anchor compare black-forest-labs qwen-image-2-1`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/black-forest-labs.json and https://www.anchorterminal.com/api/v1/tools/qwen-image-2-1.json

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