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Flux 2 Pro: High-Fidelity Multi-Reference Image Editing on playground and API | RunComfy
Transform and refine images with natural language control using Flux 2 Pro, delivering 4MP photorealistic visuals, precise color handling, and professional-grade editing speed and detail.
Introduction to Flux 2 Pro Image Editor
Black Forest Labs' Flux.2 Pro generates and edits high-resolution images at $0.03 per image, delivering up to ~4K output in about 3-5 seconds for precise image-to-image editing. Trading manual masking and reshoots for Flux 2 Pro's multi-reference, layout-aware control that locks subjects and typography, eliminating complex selection and rework; built for e-commerce teams, design studios, and marketing workflows. For developers, Flux 2 Pro on RunComfy can be used both in the browser and via an HTTP API, so you don’t need to host or scale the model yourself.
Ideal for: Campaign-Ready Product Imagery | Rapid Layout Prototyping | Brand-Consistent Visual Refreshes
Examples of Flux 2 Pro Creations






Flux 2 Pro on X: Trends and Insights
Model Overview
- Provider: Black Forest Labs
- Task: image-to-image
- Max Resolution/Duration: Up to ~4MP (≈4K); typical latency 3–5s
- Summary: Flux 2 Pro is a professional image-to-image editing model that refines or transforms images with precise layout control, multi-reference alignment, and high-fidelity color and typography. It enables fast, consistent, brand-ready outputs from one or multiple inputs. Flux 2 Pro is built for technical artists who need reliable prompt adherence, subject consistency, and print-capable resolution.
Key Capabilities
Multi-reference alignment (up to 8 inputs)
- Flux 2 Pro accepts up to eight reference images via API (9MP total) to guide style, subject identity, pose, or environment and performs edits via natural-language prompts.
- The model blends references while preserving identity and layout logic, enabling consistent assets across campaigns, product lines, or storyboard sequences.
Pixel-accurate layout, color, and text control
- Structured prompting supports clear scene/subject/style specifications, accurate hex color matching, and pose guidance through reference images.
- Outputs demonstrate strong prompt fidelity with improved on-image text clarity, helping create posters, packaging, UI mockups, and typographic assets that read cleanly.
High-resolution, edit-focused workflow
- Image-to-image outputs reach ~4MP with arbitrary aspect ratios and professional sharpness suitable for print and large digital placements.
- A combined generate-or-edit API simplifies pipelines: teams can generate first-pass concepts and then apply targeted edits without switching endpoints, improving iteration speed.
Input Parameters
Core Prompts
| Parameter | Type | Default/Range | Description |
|---|---|---|---|
| prompt | string | "" | Text instructions describing the edit(s) to apply to the input image(s). |
| image_urls | array of image URLs | [] | List of image URLs to edit. Multiple images allowed for multi-reference guidance. |
Dimensions & Output
| Parameter | Type | Default/Range | Description |
|---|---|---|---|
| image_size | string (preset or Custom) | auto; presets: auto, square_hd, square, portrait_4_3, portrait_16_9, landscape_4_3, landscape_16_9, Custom | Select a size preset or choose Custom to provide explicit width/height. |
| output_format | string | jpeg; options: jpeg, png | Output image format. Use PNG for lossless assets; JPEG for smaller files. |
API Integration
Developers can integrate Flux 2 Pro via the RunComfy API using standard HTTP requests and JSON payloads. The same endpoint supports both generation and editing, making it easy to slot into existing pipelines and CI/CD workflows without custom wrappers.
Note: API Endpoint for Flux 2 Pro
Official resources and licensing
- Official Docs (Image Editing): https://docs.bfl.ai/flux_2/flux2_image_editing
- Prompting Guide: https://docs.bfl.ai/guides/prompting_guide_flux2
- License: Proprietary/commercial license from Black Forest Labs. Commercial use is permitted per provider terms; enterprise or custom commercial use may require a separate agreement with the provider.
Explore Related Capabilities
If you need text-to-image generation (starting from prompts rather than input photos), use the Flux 2 Pro text to image endpoint without image_urls to generate from text only. For developers targeting scripted edits and generation in one pipeline, the combined generate-or-edit flow under flux-2-pro edit simplifies orchestration and reduces integration overhead.
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Frequently Asked Questions
What is Flux 2 Pro and what can it do with image-to-image editing?
Flux 2 Pro is a high-end generative model developed by Black Forest Labs that allows users to create and edit images through both text-to-image and image-to-image workflows. It’s designed for professionals needing precise control over color, style, and composition.
How is Flux 2 Pro different from earlier models when using image-to-image features?
Flux 2 Pro brings major improvements over previous versions — including support for up to 8 reference images (10 in the playground) and better photorealism for image-to-image generation. It also performs faster and follows prompts more intelligently than Flux 1.
Is Flux 2 Pro free to use for image-to-image generation?
Flux 2 Pro is accessible through the Runcomfy playground using a credit-based system. New users get free trial credits when they sign up, so you can test both text-to-image and image-to-image capabilities without immediate cost.
What kinds of outputs can I get from Flux 2 Pro using image-to-image mode?
Flux 2 Pro can produce high-quality images up to 4 megapixels in resolution, maintaining faithful color matching and realistic textures. Its image-to-image mode is ideal for refining or transforming visual inputs while preserving structure and style.
Who is Flux 2 Pro best suited for when using the image-to-image feature?
Flux 2 Pro is built for creative professionals and teams — such as those in design, marketing, branding, and e-commerce — who rely on image-to-image editing for keeping visual consistency across projects, products, or campaigns.
What file types and formats are supported by Flux 2 Pro during image-to-image editing?
Flux 2 Pro works seamlessly with common image formats like PNG and JPEG for both input and output. You can upload your source image for image-to-image editing and export results in high-resolution for print or digital use.
On which platforms can I access Flux 2 Pro for image-to-image generation?
Flux 2 Pro is available via browser through the Runcomfy playground and through an API for developers. Both the web interface and API support image-to-image capabilities, and the web app works well on mobile browsers.
Does Flux 2 Pro have limitations when performing image-to-image transformations?
While Flux 2 Pro is powerful, complex edits that require extreme perspective changes or very abstract transformations may need additional prompt tuning. Nonetheless, its image-to-image mode delivers reliable, consistent results for most use cases.
What makes Flux 2 Pro’s image-to-image models stand out from competitors?
Flux 2 Pro differentiates itself through faithful style transfer, support for multiple reference images, and precise color and lighting control. Its advanced latent flow matching architecture ensures image-to-image results rival those of other top-tier AI systems.
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