Flux vs Stable Diffusion
A detailed comparison of Flux and Stable Diffusion. See how they stack up on features, pricing, and user ratings.
Quick Summary
Flux leads with a 4.5/5 rating compared to Stable Diffusion's 4.3/5. Flux is designed for all companies, while Stable Diffusion targets solopreneur to enterprise organisations. Both tools offer free plans, so you can try each before committing. Flux provides a free trial while Stable Diffusion does not.
Flux
Open-weight image generation models from the original Stable Diffusion founders with photorealistic 4MP output
Rating
4.5/5
Best for
All
Free trial
Yes
Free plan
Yes
Stable Diffusion
Open-source image generation model (v3.5) with massive community ecosystem and local deployment
Rating
4.3/5
Best for
Solopreneur to Enterprise
Free trial
No
Free plan
Yes
Feature Comparison
| Feature | Flux | Stable Diffusion |
|---|---|---|
| API Access | ||
| Batch Generation | ||
| Image Editing | ||
| Style Transfer | ||
| Text-to-Image | ||
| Upscaling | ||
| Custom Model Training | ||
| On-Premise / Self-Hosted |
Pricing Comparison
Flux
Open Source
Free
API
Free
Stable Diffusion
Open Source
Free
Pros & Cons
Flux
Pros
- +Open-weight models (Apache 2.0 for 4B klein)
- +Photorealistic 4MP resolution output
- +400M+ downloads — massive community and ecosystem
- +Sub-1-second generation with klein models
Cons
- -Requires technical knowledge for local deployment
- -No polished consumer app (API/community-driven)
- -Smaller models have quality tradeoffs
- -Less structured support than commercial alternatives
Stable Diffusion
Pros
- +Completely free and open-source for local use
- +Maximum customisation through fine-tuning and extensions
- +No content restrictions when self-hosted
- +Huge community with thousands of custom models
Cons
- -Steep learning curve for non-technical users
- -Requires decent GPU for local use
- -Base model quality below Midjourney without fine-tuning
- -Stability AI financial instability raises concerns
Which Should You Choose?
Choose Flux if:
- • You want to start with a free plan
- • You want to try before committing
- • Open-weight models (Apache 2.0 for 4B klein)
- • Higher user ratings matter to you (4.5 vs 4.3)
Choose Stable Diffusion if:
- • Your company is Solopreneur to Enterprise size
- • You want to start with a free plan
- • Completely free and open-source for local use