Published on November 25, 2025
We are proud to announce the arrival of the Flux 2 suite by Black Forest Labs on RunDiffusion. This release is not just a single model upgrade; it is a diversified lineup of three distinct models—Dev, Flex, and Pro—each engineered to solve specific challenges in the creative pipeline.
FLUX.2 [dev]: Speed and Open-Source Efficiency
FLUX.2 [dev] is designed for teams prioritizing a high speed-to-quality ratio. Its lightweight architecture strips down to the essentials without compromising output fidelity.
- Ideal for: Rapid prototyping and high-volume generation.
- Training Ready: Serves as the foundational model for custom LoRA fine-tuning.
- Efficiency: Generates significantly faster than heavy models while maintaining professional standards.
FLUX.2 [flex]: Surgical Control and Typography
FLUX.2 [flex] offers customizable generation with granular parameter control. It is the premier choice for designs demanding typographic excellence.
- Superior Typography: Delivers best-in-class text rendering accuracy for logos and signage.
- Adjustable Steps: Control your quality/speed balance (10-20 steps for prototypes, 40-50 for final deliverables).
- Guidance Tuning: Fine-tune prompt adherence to balance literal instruction vs. creative interpretation.
FLUX.2 [pro]: Production-Optimized Quality
FLUX.2 [pro] delivers studio-grade images through a streamlined pipeline. It removes generation complexity to focus on consistent, high-fidelity results.
- Zero-Configuration: No inference steps or guidance scales to adjust.
- Prompt Enhancement: Automatic prompt upsampling is enabled by default for optimal interpretation.
- Consistency: Predictable results ideal for commercial pipelines.
Advanced Feature: JSON Structured Prompts
For precise control over complex generations, Flux 2 introduces JSON Structured Prompts. Instead of natural language, you can now use structured data to provide granular specifications of scene elements, subjects, and camera settings.
