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Flux.2 [flex]

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Image modelBlack Forest Labs

Overview

Flux.2 [flex] is an image generation and editing model developed by Black Forest Labs. While Flux.2 [pro] focuses on cinematic photorealism, this specialized model is purpose-built for text-heavy workflows, handling complex typography, infographics, and UI prototyping. It preserves fine details in dense scenes and allows users to adjust inference steps to balance speed and quality, making it a practical choice for precise brand design and multi-reference compositing.

Best of Flux.2 [flex]

A wide-angle, symmetrical shot of an empty, modern fashion runway hallway. The scene features a highly polished floor reflecting overhead stage lights, white minimalist walls with benches, and a bright light source at the far end. Generated using Flux.2 [flex] at 1024x576 resolution.Modern Fashion Runway Hallway — Flux.2 [flex]A close-up shot of a majestic male lion with a full mane standing in the African savanna. The scene is bathed in warm golden hour light from a sunset. In the background, acacia trees and distant hills are visible under an orange sky. Created using Flux.2 [flex] at 1024x576 resolution.Majestic Lion at Sunset — Flux.2 [flex]A high-resolution 1024x576 text-to-image generation using the Flux.2 [flex] model. A colossal orange tabby cat with its mouth wide open floats in deep space next to a small, glowing planet Earth. The background features colorful pink and teal nebulas and a distant spiral galaxy.Cosmic Ginger Cat in Space — Flux.2 [flex]

What types of generations is Flux.2 [flex] best suited for?

Flux.2 [flex] is specialized for text-heavy design, typography, and UI prototyping. While Flux.2 [pro] focuses on pure photorealism, the flex variant is optimized to render clean text, logos, and complex layouts like infographics. It also supports multi-reference editing with up to 10 reference images, making it highly effective for maintaining character or product consistency across various scenes and compositions.

When was Flux.2 [flex] released, and how does it fit into the Flux family?

Black Forest Labs introduced the Flux.2 family on November 25, 2025, succeeding earlier models like Flux 1.1 Pro and Flux 1.1 Ultra. The lineup includes the flagship Flux.2 [pro], the high-fidelity Flux.2 [max], the fast Flux.2 [klein] 9B, and this configurable flex model. Unlike its siblings that lock down parameters for consistency, Flux.2 [flex] exposes inference steps and guidance scale, allowing developers to manually adjust the speed-to-quality ratio.

How can I get the best results from Flux.2 [flex]?

Take advantage of its exposed parameters by adjusting the guidance scale (CFG) and step count to find your preferred balance of speed and detail. For precise layouts, the model responds well to structured JSON prompting and exact hex color codes. When doing multi-image compositing, supply up to 10 reference images to blend characters and styles seamlessly. For detailed prompt formatting advice, review the official Black Forest Labs blog.

Similar models

Flux Kontext MaxBlack Forest LabsFlux Kontext ProBlack Forest LabsFlux.2 [klein] 9BBlack Forest LabsFlux.2 [max]Black Forest LabsFlux.2 [pro]Black Forest Labs

Prompt tips

  • Structure prompts as JSON: Use JSON formatting with specific keys like scene, subjects, style, lighting, and camera to force strict compositional control.

  • Use positive constraints: Instead of writing "no messy background," use affirmative descriptions like "clean, solid white background."

  • Specify HEX color codes: Include exact HEX codes in your text prompt to maintain strict brand color guidelines in product shots or UI designs.

  • Stack reference images: Upload multiple reference images in a single generation to combine a specific subject's likeness with a completely different artistic style.