Flux is an open-source image generator by Black Forest Labs (founded by former Stability AI developers). Flux 2 is the current model and offers the best price-performance ratio of all image generators: It generates images in just 4.5 seconds, can run locally on your own hardware from 12GB VRAM, and provides maximum control via ComfyUI workflows.

Yes, Flux is open source and can be run for free on your own hardware (minimum 12GB VRAM required). Alternatively, Flux can be used via cloud APIs: Fal.ai charges about $0.01-0.03 per image, Replicate about $0.003-0.01 per image. This makes Flux significantly cheaper than Midjourney ($8-30/month) or DALL-E ($0.04/image via API).

Flux vs. Midjourney vs. DALL-E — which tool?

Midjourney delivers the best aesthetics and is ideal for campaign visuals and hero images. DALL-E (via ChatGPT) is the most accessible and has the best text rendering. Flux offers the best price-performance ratio, the fastest generation and full control — ideal for volume production (50+ variants for A/B tests), privacy-critical projects and custom workflows with fine-tuning.

Flux — Open-Source Image Generator Explained

Name: Flux
Author: Black Forest Labs

// Description

Flux 2 by Black Forest Labs — founded by former Stability AI developers — is the open-source image generator with the best price-performance ratio on the market (as of March 2026). While Midjourney leads in aesthetics and DALL-E in accessibility, Flux dominates in three areas: Speed (4.5 seconds per image), Cost (from $0.003 per image via API) and Control (fully executable locally, custom workflows via ComfyUI).

Flux can be run entirely on your own hardware — from 12 GB VRAM (e.g. RTX 4070). This makes it the first choice for privacy-critical projects where images must not leave the company. Via ComfyUI, complex generation pipelines can be built: ControlNet for poses, IP-Adapter for style transfer, LoRA fine-tuning for brand-specific visual language. No other image generator offers this depth of technical control.

The API prices are unbeatable: Fal.ai charges ~$0.01-0.03 per image, Replicate ~$0.003-0.01 per image. For comparison: DALL-E costs $0.04 per image via API, Midjourney has no official API. For volume production — when 50+ image variants are needed for A/B tests or product catalogs — Flux is 5-10x cheaper than any alternative.

The weaknesses: Text rendering in images is not yet consistent (DALL-E is better here), and the pure aesthetics don't quite reach Midjourney level. For hero images and campaign visuals, professionals still reach for Midjourney — for everything else, Flux is the more economical choice.

// Use Cases

Volume Image Generation
Privacy-Critical Projects
Custom Workflows
Rapid Prototyping
ComfyUI Pipelines
Fine-Tuning

// Pricing

Open Source (free, own hardware) / Fal.ai API: ~$0.01–0.03/image / Replicate: ~$0.003–0.01/image

// AI Pirates Assessment

Flux is our secret weapon for volume production: When we need 50+ image variants for A/B tests, Flux via API is unbeatable in terms of cost. For hero images and campaign visuals, we still rely on Midjourney. The combination of both tools — Midjourney for quality, Flux for quantity — is our standard setup for visual content.

Visit: Flux (Black Forest Labs)

Flux

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// Use Cases

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