FLUX Kontext
FLUX.1 Kontext [pro] handles both text and reference images as inputs, seamlessly enabling targeted, local edits and complex transformations of entire scenes.
By Black Forest Labs
Pricing: $0.04 per image
Overview
FLUX Kontext [pro], 12B-param in-context editor. Character consistency, style transfer, local edits. $0.04/image.
Key capabilities
- **Character consistency without fine-tuning**, Preserves subject identity, style, and brand elements across edits, no LoRA training or per-subject fine-tuning needed.
- **Up to 8× faster than competitors**, Significantly faster inference than competing in-context editing models while maintaining high-quality results.
- **Local and global edits in one model**, Handles everything from targeted region edits (change a shirt colour) to full scene transformations (move from studio to beach), no separate models or masks needed.
- **Multi-turn editing**, Apply successive refinements that maintain visual coherence, each edit builds on the previous one without degrading quality.
FLUX Kontext model family by Black Forest Labs
| Model | Details |
|---|---|
| **FLUX Kontext [max]** | Premium, best prompt adherence and typography, $0.08/image |
| **FLUX Kontext [pro]** (this model) | Standard, fast in-context editing with character consistency, $0.04/image |
Technical specifications
| Spec | Details |
|---|---|
| Architecture | Rectified Flow Transformer with reference conditioning |
| Parameters | 12 billion |
| Mode | Image-to-image (in-context editing) |
| Speed | Up to 8× faster than state-of-the-art models |
| Guidance Scale | 3.5 (default) · 1–20 range |
| Max Batch Size | 4 images per request |
| Input Formats | JPG · JPEG · PNG · WebP · GIF · AVIF |
| Output Formats | JPEG · PNG |
| License | Commercial |
Examples
- A sleeping orange tabby cat added between the monitors on the desk
Frequently asked questions
- What is FLUX Kontext [pro]?
- FLUX Kontext [pro] is Black Forest Labs' 12B-parameter in-context image editing model. It takes a source image and a text prompt, then applies targeted or full-scene edits while preserving subject identity, no masks or fine-tuning required.
- How much does FLUX Kontext [pro] cost on Runflow?
- $0.04 per image, flat pricing. Cold starts are not billed.
- How does FLUX Kontext [pro] compare to FLUX Kontext [max]?
- FLUX Kontext [pro] is faster and cheaper ($0.04 vs $0.08/image) for standard editing. [max] has stronger prompt adherence and better typography for demanding workflows. Both preserve subject identity.
- Can FLUX Kontext do multi-turn editing?
- Yes. You can apply successive edits that build on each other while maintaining visual coherence, each iteration preserves the results of previous transformations.
- What input formats does FLUX Kontext [pro] accept?
- JPG, JPEG, PNG, WebP, GIF, and AVIF. Pass the source image as a URL via the image_url parameter.
- Can I use FLUX Kontext [pro] commercially?
- Yes. FLUX Kontext [pro] is available under a commercial license for production applications, SaaS products, and client work.
- Do I need to manage GPUs or infrastructure?
- No. Runflow handles all GPU provisioning, scaling, and failover. You make an API call, you get back an image.
Related models
- 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. Flux-fill restores the background without requiring a mask.
- Smart Segmentation, Segment a requested subject from an image using the SAM3 VLM workflow. Returns one or more mask/segmentation outputs from a prompt-guided image analysis pass.
- Background Replace, Swap the background of any product photo for a new scene defined by a reference image and a short prompt. The model preserves the foreground subject while matching camera angle and lighting to the new background.
Discoverable surfaces
- Dispatch endpoint:
POST https://api.runflow.io/v1/models/flux-pro/kontext/runs - Per-model spec (markdown): https://app.runflow.io/models/flux-pro/kontext/llms.txt
- Docs page: https://docs.runflow.io/models/flux-pro/kontext
- 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