Flux vs Stable Diffusion: Complete Comparison 2026
Choosing between Flux and Stable Diffusion? We compare both tools across features, pricing, pros and cons to help you decide which is the better fit in 2026.
Black Forest Labs · Image Generation
Flux, from the team behind Stable Diffusion, is a family of open and commercial image models that quickly set a new bar for photorealism and prompt fidelity. Its open variants can be self-hosted and fine-tuned, while hosted versions power many apps. Flux is favoured by developers who want state-of-the-art quality with flexible licensing.
Stability AI · Image Generation
Stable Diffusion is the open-weight image model that ignited the generative-art movement and remains the backbone of countless tools. It can be run locally or in the cloud, fine-tuned, and extended with LoRAs, ControlNet and a vast ecosystem of community models. For users who want total control and no per-image fees, it is unmatched.
Side-by-side comparison
| Feature | FluxBlack Forest Labs | Stable DiffusionStability AI |
|---|---|---|
| Quality score | 9.0 / 10 | 8.5 / 10 |
| Starting price | Pay per image | Free (self-host) |
| Free tier | Yes — Open weights (some variants) | Yes — Free and open weights |
| API input price | — | — |
| API output price | — | — |
| Speed | Medium | Medium |
| Context window | — | — |
| Categories | Image Generation | Image Generation |
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Pricing comparison
The verdict
Overall, Flux edges ahead with a quality score of 9.0 versus 8.5 for Stable Diffusion. Choose Flux if you want top-tier realism and detail. That said, Stable Diffusion is the better pick when total control and customization matters most — so the right answer depends on your priorities and budget.