FLUX.1 [schnell]

FLUX.1 [schnell] is a 12 billion parameter flow transformer that generates high-quality images from text in 1 to 4 steps, suitable for personal and commercial use.

By Black Forest Labs

Pricing: $0.003 per megapixel

Overview

FLUX.1 [schnell] is a 12 billion parameter flow transformer that turns text prompts into high-quality images in just 1 to 4 steps. It is built for speed, making it a strong fit for rapid iteration, drafts, and high-volume generation.

Key capabilities

• $0.003 per megapixel, roughly 333 standard 1MP images per $1, with simple fixed per-call pricing.
• Multi-region failover. Runflow runs optimized inference across multiple regions, routing around outages automatically.
• Few-step generation in 1 to 4 inference steps for fast turnaround.
• Reliable prompt adherence and clean detail from a 12B flow transformer.
• Licensed for both personal and commercial use.

Technical specifications

| Spec | Detail |

| --- | --- |

| Architecture | 12B flow transformer |

| Steps | 1 to 4 inference steps |

| Output format | JPEG or PNG |

| Resolution | Configurable image size |

Examples

• A close-up portrait of an elderly fisherman with a weathered face and silver stubble, warm golden hour light raking across deep wrinkles, soft bokeh harbor behind him, shot on 85mm lens, photorealistic.
• A rain-slicked Tokyo alley at night glowing with pink and cyan neon signs, reflections shimmering in puddles, a lone figure with an umbrella walking away, cinematic, moody.
• A matte black ceramic coffee mug on a pale concrete surface, soft morning window light, faint steam rising, minimalist styling, clean studio product photography.
• A floating island with cascading waterfalls and ancient ruins, drifting clouds below, two moons in a violet sky, lush green forests on the rocks, epic wide shot, painterly detail.
• A flat vector illustration of a cozy reading nook with a cat curled on a chair, a tall bookshelf, a steaming teacup, warm autumn color palette, clean shapes.
• An extreme macro shot of a dew-covered bee resting on a sunflower petal, droplets catching morning light, shallow depth of field, vivid yellows and greens.
• A sleek silver exploration rover crossing a red desert on an alien planet, twin suns low on the horizon, dust trail behind it, dramatic backlighting, concept art.
• A stack of fluffy pancakes drizzled with maple syrup and topped with fresh blueberries, butter melting on top, soft natural light, overhead angle, appetizing detail.

Frequently asked questions

What is FLUX.1 [schnell]?

FLUX.1 [schnell] is a 12 billion parameter flow transformer that generates high-quality images from text prompts in 1 to 4 steps. It is tuned for speed while keeping strong prompt adherence and detail.

How much does FLUX.1 [schnell] cost on Runflow?

It costs $0.003 per megapixel. A standard 1 megapixel image works out to about 333 images per $1, with simple fixed per-call pricing.

How long does FLUX.1 [schnell] take to run?

Because it generates in only 1 to 4 inference steps, most images return in a few seconds. Larger sizes and higher image counts add some time.

Can I use FLUX.1 [schnell] commercially?

Yes. FLUX.1 [schnell] is licensed for both personal and commercial use, so you can use generated images in commercial projects.

Do I need to manage GPUs or infrastructure?

No. Runflow handles all inference with multi-region failover, so you call one API and get results back. No AI team required.

How do I get started with FLUX.1 [schnell] on Runflow?

Grab your API key, send a prompt with an optional image size and format, and receive your generated image. You can scale the number of images per call as needed.

Related models

• FLUX.1 [dev], FLUX.1 [dev] is a 12 billion parameter flow transformer that generates high-quality images from text prompts, suitable for personal and commercial use.
• FLUX 1.1 [pro] Ultra, Ultra-resolution variant of FLUX 1.1 [pro] with 4MP+ outputs and richer detail. Drop-in upgrade when the standard FLUX 1.1 [pro] resolution is the bottleneck.
• FLUX 1.1 [pro], Black Forest Labs' production-grade FLUX 1.1. State-of-the-art prompt adherence and photoreal quality at competitive per-image pricing.
• SDXL-Lightning, ByteDance lightning-fast SDXL distillation. 4-step text-to-image at near-real-time latency.

Discoverable surfaces

• Dispatch endpoint: POST https://api.runflow.io/v1/models/flux-schnell-lt1/runs
• Per-model spec (markdown): https://app.runflow.io/models/flux-schnell-lt1/llms.txt
• Docs page: https://docs.runflow.io/models/flux-schnell-lt1
• Public OpenAPI spec: https://docs.runflow.io/api/openapi.public.json
• Agent skill (start here): https://www.runflow.io/.well-known/agent-skills/runflow/SKILL.md