FLUX.1 [dev] Edit

Image-to-image edits with FLUX.1 [dev]. Pass a source image plus a prompt and a transformation strength to redirect the composition while preserving subject identity.

By Black Forest Labs

Pricing: $0.025 per image

Overview

FLUX.1 [dev] Edit by Black Forest Labs is the image-to-image variant of FLUX.1 [dev], a 12B-parameter Rectified Flow Transformer. Pass a source image plus a text instruction and the model rewrites the scene with FLUX's signature prompt adherence.

Key capabilities

• **$0.025 per image at 1024x1024**, fixed per-call pricing. About 40 runs per $1.
• **Multi-region failover**, Runflow routes FLUX.1 [dev] Edit across multiple regions. If one region has an outage, traffic moves to another automatically.
• **Identity preservation**, controllable via the `strength` input (0.0 to 1.0).
• **Open-weight base**, the underlying model is the FLUX.1 [dev] open release.

FLUX.1 family by Black Forest Labs

| Model | Details |

|---|---|

| **FLUX.1 [dev] Edit** (this model) | 12B params, image-to-image with strength control |

| **FLUX 1.1 [pro]** | Production-grade text-to-image, higher quality |

| **FLUX 1.1 [pro] Ultra** | Premium tier at up to 4MP |

Technical specifications

| Spec | Details |

|---|---|

| Architecture | Rectified Flow Transformer |

| Parameters | 12 billion |

| Inputs | prompt, source image, seed, strength, steps |

| Output Format | JPEG |

Examples

• Transform the engineer into a samurai warrior with traditional kabuto armor and a katana, dramatic lighting, photoreal cinematic style

Frequently asked questions

What is FLUX.1 [dev] Edit?

FLUX.1 [dev] Edit is the image-to-image variant of Black Forest Labs' 12B-parameter FLUX.1 [dev] model. Pass a source image plus a text instruction and the model rewrites the scene with FLUX's prompt adherence, with a strength control that decides how much of the source to keep.

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

FLUX.1 [dev] Edit is $0.025 per image at 1024x1024, fixed per-call pricing. That's about 40 runs per $1. No tiered or surge pricing.

What's the latency of FLUX.1 [dev] Edit?

Latency varies with the source image size and the number of inference steps. Typical runs at 1024x1024 with default settings complete in a few seconds on Runflow's API.

Can I use FLUX.1 [dev] Edit 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 [dev] Edit?

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

• Multi Angles, Re-render the same subject from a different camera angle. Pick a horizontal view, a vertical angle, and a shot distance: the model rotates the camera around the subject and re-renders the scene from that pose.
• FLUX.2 [klein] 4B Edit, Fast image-edit endpoint backed by FLUX.2 [klein] 4B. Pass a base64 source image with the prompt for low-latency edits.
• Logo Inpaint, Place a logo onto a target image, with optional mask to constrain placement. When the mask is omitted, the workflow picks a placement automatically.
• Object Removal (Prompt), Remove requested objects from a photo using a short text instruction. The model restores the background without requiring a mask.

Discoverable surfaces

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