flux-1-1-pro/ultra/text-to-image
Dive into 2K worlds of photorealism.
Black Forest Labs's Flux.2 Dev turns text into high-fidelity images at just $0.013 per image, outputting up to ~4MP resolution with long-context prompt understanding and native multi-reference consistency. Trading manual masking and hours in Photoshop for layout-aware generation with readable on-image text, Flux 2 Dev streamlines production by eliminating brittle prompt hacks and rework, built for agencies, marketing teams, and product designers. For developers, Flux 2 Dev 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 | Cross-Scene Character and Brand Consistency | Layout-Accurate UI Mockups and On-Image Typography
| Parameter | Type | Default/Range | Description |
|---|---|---|---|
| prompt | string | Default: "" | The textual description of the desired image. Use natural language with details on subject, style, lighting, and layout. |
| enable_prompt_expansion | boolean | Default: false | If true, expands the prompt automatically for potentially richer results. |
| guidance_scale | float | Default: 2.5 | Controls adherence to the prompt. Higher values follow the prompt more closely but may reduce visual quality. |
| Parameter | Type | Default/Range | Description |
|---|---|---|---|
| image_size | string | Default: landscape_4_3; Choices: square_hd, square, portrait_4_3, portrait_16_9, landscape_4_3, landscape_16_9, Custom | Choose a preset aspect ratio or select Custom to specify width/height (512�?048 px each side). |
| num_inference_steps | integer | Default: 28 | Number of denoising steps. Higher values generally improve quality but increase latency. |
| num_images | integer | Default: 1 | Number of images to generate in one request. |
| acceleration | string | Default: regular; Choices: none, regular, high | Select acceleration level for generation based on your performance/quality needs. |
| seed | integer | Default: 0 | Random seed for reproducibility. Use the same seed to repeat results. |
| Parameter | Type | Default/Range | Description |
|---|---|---|---|
| output_format | string | Default: png; Choices: jpeg, png, webp | Output image file format. Use PNG/WebP for transparency or lossless needs; JPEG for smaller size. |
Developers can integrate Flux 2 Dev via the RunComfy API using standard HTTP requests. The interface mirrors common T2I pipelines, so you can pass prompts, sizes, and sampling settings with minimal setup. Integration is designed for rapid prototyping and production rollouts alike.
Note: API Endpoint for Flux 2 Dev
The rate is $0.013 per image.
Dive into 2K worlds of photorealism.
Create lifelike visuals and illustrations from text with flexible design control.
Fast, low-cost text-to-image generation at a fixed 1K resolution.
Create seamless cinematic sequences with smooth framing and stable lighting for coherent story visuals.
Fast, precise, iterative AI image editing model.
Create photoreal visuals with multi-reference, color, and typography precision.
Flux 2 Dev is an open-weight generative model created by Black Forest Labs that specializes in advanced text-to-image generation and image editing. It allows users to create new images directly from text prompts or modify existing ones while maintaining realism and stylistic consistency.
Compared to older models like FLUX.1 Dev, Flux 2 Dev offers major improvements in text-to-image realism, better handling of multiple image references, sharper detail, and more accurate text rendering. It also supports up to 10 reference images and outputs up to about 4 megapixels.
Flux 2 Dev offers free trial credits for new users via the Runcomfy AI playground. After that, additional text-to-image generations require credits, which can be purchased or earned depending on the platform’s credit policy.
Flux 2 Dev is ideal for artists, designers, marketers, and studios needing consistent visual branding, realistic mockups, or creative image generation. Its text-to-image capability is especially valuable for those in design, advertising, and digital art who require control over color, layout, and references.
Users can expect highly photorealistic results from Flux 2 Dev’s text-to-image engine, characterized by precise lighting, textures, and readable text. The model’s 32-billion-parameter architecture ensures fidelity and quality across a wide range of creative scenarios.
Yes, Flux 2 Dev supports dual workflows—text-to-image generation from detailed prompts and direct image editing where you can modify existing images with precise control while preserving key elements.
Flux 2 Dev can be accessed through the Runcomfy AI playground via web or mobile browsers. After logging in, users can use their credits to generate text-to-image results or perform image editing tasks directly online.
While Flux 2 Dev delivers strong performance, it currently supports images up to around 4 megapixels, and commercial usage may require a separate license. Additionally, text-to-image rendering quality depends on prompt clarity and available compute credits.
Yes, because Flux 2 Dev is an open-weight model, it can be used locally for research or non-commercial text-to-image experimentation. Developers and researchers can integrate it into custom workflows or applications.
RunComfy is the premier ComfyUI platform, offering ComfyUI online environment and services, along with ComfyUI workflows featuring stunning visuals. RunComfy also provides AI Models, enabling artists to harness the latest AI tools to create incredible art.
