FLUX vs Stable Diffusion
A side-by-side comparison of capabilities, autonomy, integrations, and pricing to help you choose.
Short answer: choose FLUX if you want rectified-flow image generation and editing models, open-weight and via api (Assistant, usage); choose Stable Diffusion if you want open-weight text-to-image diffusion models that run on your own hardware (Assistant, freemium).
| FLUX | Stable Diffusion | |
|---|---|---|
| What it is | Rectified-flow image generation and editing models, open-weight and via API | Open-weight text-to-image diffusion models that run on your own hardware |
| Type | framework | framework |
| Autonomy | Assistant | Assistant |
| Pricing | usage · Free (open weights); API from ~$0.014/image | freemium · Free (open weights); API credits from $10/1,000 |
| Best for | developers, smb, enterprise | developers, smb, consumers |
| Deployment | self-hosted, saas, api | self-hosted, saas, api |
| Modalities | text, image, api | text, image, api |
| Models | open-source, proprietary | open-source, proprietary |
| Protocols | rest-api | rest-api |
| Integrations | Hugging Face Diffusers, ComfyUI, Replicate, fal, Together AI, Vercel AI Gateway | ComfyUI, Hugging Face Diffusers, AUTOMATIC1111, Replicate, Fireworks AI, DeepInfra |
| Capabilities | 5 documented | 5 documented |
FLUX
- +Multiple open-weight tiers (FLUX.1 [schnell] and FLUX.2 [klein] are Apache 2.0) you can download and self-host
- +FLUX Kontext and FLUX.2 offer strong in-context, multi-turn editing with consistent characters and styles
- +Pay-as-you-go API with no subscriptions or seat fees, and a large ecosystem (Diffusers, ComfyUI, Replicate, fal, Together)
- -An engine and assistant, not an autonomous agent: the human prompts, curates, and iterates on every output
- -The strongest tiers (Pro, Max, FLUX.2 Flex/Pro/Max) are proprietary and API-only, not open weights
Stable Diffusion
- +Open weights you can download and run locally on consumer hardware, no per-image fee for self-hosting
- +Huge ecosystem (ComfyUI, Diffusers, AUTOMATIC1111, ControlNet, LoRAs) plus fine-tuning and customization
- +Permissive Community License: free for non-commercial use and for commercial use under $1M annual revenue
- -An assistant, not an autonomous agent: the human prompts, curates, and iterates on every output
- -Self-hosting requires a capable GPU and technical setup (the easy path is third-party apps or the hosted API)
Which should you choose?
FLUX is rectified-flow image generation and editing models, open-weight and via api, best for developers, smb, enterprise. Stable Diffusion is open-weight text-to-image diffusion models that run on your own hardware, best for developers, smb, consumers. The right choice depends on the autonomy level you want, your existing integrations, and your budget, all compared above.