Flux

by Black Forest Labs

Freemium

State-of-the-art open-source image generation model known for exceptional prompt adherence, photorealism, and text rendering capabilities.

4.5
out of 5.0 · 3+ reviews
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Category Image & Design
Last Updated March 22, 2026
Website blackforestlabs.ai

Overview

Flux is an open-source rectified flow transformer with 12 billion parameters developed by Black Forest Labs (founded by the original creators of Stable Diffusion). It delivers studio-grade photorealism with exceptional detail in skin textures, lighting, reflections, and fabric folds, and achieves top marks in prompt adherence across benchmarks.

Available in three versions: FLUX.1 Pro (commercial API), FLUX.1 Dev (non-commercial research), and FLUX.1 Schnell (personal use, fastest). FLUX.2 Pro is the latest generation — a zero-configuration pipeline delivering predictable quality at any scale. The model powers image generation for Grok (xAI) and is widely used across the open-source community.

Pricing

Schnell
Free
  • Open-weight model for personal use
  • Run locally on your own GPU
  • Apache 2.0 license
Dev
Free (Non-commercial)
  • Open-weight model for research and non-commercial use
  • Higher quality than Schnell

Pros & Cons

Pros

Studio-grade photorealism — exceptional skin, lighting, and fabric detail
Top prompt adherence scores — follows specific instructions more consistently than competitors
Excellent text rendering within images
Open-source versions available for local deployment
Very competitive API pricing ($0.03/megapixel)
12B parameters deliver quality rivaling closed-source models
Active open-source community with growing ecosystem

Cons

Less suited for wild creativity and unique artistic styles compared to Midjourney
No web UI from Black Forest Labs — requires API or third-party platforms
Local deployment needs powerful GPU (12B parameter model)
Smaller ecosystem than Stable Diffusion (fewer LoRAs, extensions)
Dev version restricted to non-commercial use
Iteration speed can be slower than lighter models

Reviews

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5.0 out of 5.0
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