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.

By Black Forest Labs

Pricing: $0.04 per request

Overview

FLUX 1.1 [pro] by Black Forest Labs is the production-grade text-to-image model from the FLUX 1.1 family. Sharp prompt adherence and photoreal quality at competitive per-image pricing.

Key capabilities

• **$0.040 per image**, fixed per-call pricing. 25 runs per $1.
• **Multi-region failover**, Runflow routes FLUX 1.1 [pro] across multiple regions. If one region has an outage, traffic moves to another automatically.
• **Photoreal quality**, the production tier of the FLUX 1.1 release.
• **Wide aspect-ratio support**, generate at common production sizes from a single prompt.

FLUX 1.1 family by Black Forest Labs

| Model | Details |

|---|---|

| **FLUX 1.1 [pro]** (this model) | Production-grade text-to-image |

| **FLUX 1.1 [pro] Edit** | Image-to-image variant of the pro tier |

| **FLUX 1.1 [pro] Ultra** | Up to 4MP output, premium tier |

| **FLUX.1 [dev]** | Open-weight 12B research and dev release |

Technical specifications

| Spec | Details |

|---|---|

| Architecture | Rectified Flow Transformer |

| Resolution | Up to 1440x1440 |

| Inputs | prompt, seed, width, height |

| Output Format | JPEG |

Examples

• a serene japanese garden with cherry blossoms at dawn

Frequently asked questions

What is FLUX 1.1 [pro]?

FLUX 1.1 [pro] is Black Forest Labs' production-grade text-to-image model from the FLUX 1.1 family. Sharp prompt adherence and photoreal output at common production resolutions.

How much does FLUX 1.1 [pro] cost on Runflow?

FLUX 1.1 [pro] is $0.040 per image, fixed per-call pricing. 25 runs per $1, regardless of aspect ratio.

What's the latency of FLUX 1.1 [pro]?

Latency varies with output resolution and seed. Typical 1024x1024 runs complete in a few seconds on Runflow's API.

Can I use FLUX 1.1 [pro] commercially?

Yes. Runs made through Runflow's API are licensed for commercial use, including embedding outputs in customer-facing products.

Do I need to manage GPUs to run FLUX 1.1 [pro]?

No GPU management is required. Runflow handles inference infrastructure across multiple regions and routes requests automatically. You hit a single REST endpoint, you get a result.

Related models

• 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.
• SDXL-Lightning, ByteDance lightning-fast SDXL distillation. 4-step text-to-image at near-real-time latency.
• GPT Image 2, GPT Image 2.0, OpenAI's latest image model, is capable of creating extremely detailed images with fine typography.
• FLUX.2 [klein] 9B, Text-to-image generation with FLUX.2 [klein] 9B from Black Forest Labs. Enhanced realism, crisper text generation, and native editing capabilities.

Discoverable surfaces

• Dispatch endpoint: POST https://api.runflow.io/v1/models/flux-1-1-pro/runs
• Per-model spec (markdown): https://app.runflow.io/models/flux-1-1-pro/llms.txt
• Docs page: https://docs.runflow.io/models/flux-1-1-pro
• 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