Black Forest Labs
black-forest-labsBlack Forest Labs's 6 models on ModelRunner span Image-to-Image and Text-to-Image, from $0.03 per image upward.
6 public models — every one runnable in a free playground, through the REST API and JavaScript SDK, or from an AI assistant over MCP.
Black Forest Labs models & pricing
![FLUX.2 [flex]](/resources/images?src=https%3A%2F%2Fmedia.modelrunner.ai%2F0Caf4WGl920hxvLz6Ub99.webp&w=720&h=320&fit=cover&format=webp)
FLUX.2 [flex]
black-forest-labs
Generate images from a text prompt with adjustable inference steps and guidance scale for fine-tuned control over speed, fidelity, and text rendering.
![FLUX.2 [pro]](/resources/images?src=https%3A%2F%2Fmedia.modelrunner.ai%2FxgMeLbBwsTI6uwckAIygu.webp&w=720&h=320&fit=cover&format=webp)
FLUX.2 [pro]
black-forest-labs
Generate production-grade images from a text prompt with maximum fidelity and top prompt adherence, no tuning knobs required.
![FLUX.1 Kontext [max]](/resources/images?src=https%3A%2F%2Fmedia.modelrunner.ai%2F1cDp1jNpkdjormAwwJEmu.webp&w=720&h=320&fit=cover&format=webp)
FLUX.1 Kontext [max]
black-forest-labs
Edit an existing image from a text instruction — change objects, style, background, or text — at the family's highest fidelity, with top-tier prompt adherence, the strongest typography and consistency, and commercial-usage rights.
![FLUX.1 Kontext [pro]](/resources/images?src=https%3A%2F%2Fmedia.modelrunner.ai%2F2J8YHH4XYsQpstNdpva18.webp&w=720&h=320&fit=cover&format=webp)
FLUX.1 Kontext [pro]
black-forest-labs
Edit an existing image from a text instruction — change objects, style, background, or text — with high prompt adherence, legible typography, and commercial-usage rights.
![FLUX.1 Kontext [dev]](/resources/images?src=https%3A%2F%2Fmedia.modelrunner.ai%2FBgTr2HwQEj4oKEsmpAAwI.webp&w=720&h=320&fit=cover&format=webp)
FLUX.1 Kontext [dev]
black-forest-labs
Edit an existing image from a text instruction — change objects, style, background, or text — while keeping the rest of the photo consistent.
![FLUX.2 [dev]](/resources/images?src=https%3A%2F%2Fmedia.modelrunner.ai%2FM4SfB1bSSQp49d5W0tmnX.webp&w=720&h=320&fit=cover&format=webp)
FLUX.2 [dev]
black-forest-labs
Generate high-quality images from a text prompt with strong prompt adherence and efficient, fast inference.
What you can build with Black Forest Labs models
- Generate images while tuning quality vs. speed with step count and guidance FLUX.2 [flex]
- Render legible typography and accurate text inside a generated image FLUX.2 [flex]
- Iterate from a fast low-step draft to a high-step final render FLUX.2 [flex]
- Create photorealistic scenes and product shots from a text prompt FLUX.2 [flex]
- Fine-tune prompt adherence by raising the guidance scale FLUX.2 [flex]
- Generate final production-grade images with maximum fidelity FLUX.2 [pro]
- Create photorealistic product and editorial shots from a text prompt FLUX.2 [pro]
- Produce brand-consistent campaign visuals in high volume FLUX.2 [pro]
Browse by capability
Call a Black Forest Labs model in one request
Every endpoint shares the same lifecycle: submit to the queue, poll the status URL, fetch the result. Swap the endpoint to switch models — nothing else changes.
cURL
curl -X POST https://queue.modelrunner.run/black-forest-labs/flux-2/flex \
-H "Authorization: Key $MRUN_API_KEY" \
-H "Content-Type: application/json" \
-d '{ "prompt": "..." }'
# → { "request_id": "...", "status_url": "...", "response_url": "..." }Use Black Forest Labs models from Claude & Cursor
Connect the ModelRunner MCP server once and your AI assistant can run every Black Forest Labs model on this page as a tool — authorized via OAuth, results returned as hosted URLs in the conversation.
Claude Code
claude mcp add --transport http modelrunner https://mcp.modelrunner.run/mcpFrequently asked questions
What Black Forest Labs models can I run on ModelRunner?
The catalog has 6 public Black Forest Labs models: FLUX.2 [flex], FLUX.2 [pro], FLUX.1 Kontext [max] and 3 more. They cover image-to-image and text-to-image. Each one has its own page with a free playground, the full input schema, and copy-paste code.
How much do Black Forest Labs models cost?
Pay-per-use, with no subscription: the 4 Black Forest Labs models billed per image start at $0.03, and every page publishes its own rate — some are tiered, so a lower resolution or a shorter clip costs less per run. You buy credits and pay only for what you generate.
How do I call a Black Forest Labs model from the API?
POST to https://queue.modelrunner.run/black-forest-labs/flux-2/flex with an Authorization: Key header and the input fields as the top-level JSON body (no wrapper object), then poll the returned status_url and fetch the result from response_url. The JavaScript SDK (@modelrunner/client) wraps that in a single subscribe() call, which is the one place an { input } object is used.
Can I run Black Forest Labs models from Claude or Cursor?
Yes. Connect the ModelRunner MCP server (https://mcp.modelrunner.run/mcp) once and all 6 Black Forest Labs models become tools your assistant can call with run_model — authorized over OAuth 2.1, so no API key goes into a config file. Results come back as hosted URLs in the conversation.
More on ModelRunner
Browse the full model catalog, compare live per-configuration rates on the pricing page, see curated sets on explore, or view every model creator.
