Stable Diffusion 3.5
Stable Diffusion 3.5 is Stability AI's October 2024 stills family (Large / Medium / Large Turbo), not a fully MIT dump and not the only thing on the 2026 homepage. Hugging Face stabilityai/stable-diffusion-3.5-large is gated under stabilityai-ai-community, not MIT. The company homepage also leads with Stable Audio 3.0 and Brand Studio.
Compare FLUX 3 if you wanted Black Forest Labs' live multimodal model, Flux.1 Dev if you wanted another licensed open-weight stills SKU, and GPT Image 2 if you wanted OpenAI stills.
Key Features
- Three 2024 stills SKUs: The image page still lists Large (professional 1MP), Turbo (faster, four-step claim), and Medium (consumer hardware).
- Community license, not MIT: HF requires agreeing to Stability's license. Self-hosted and API are separate commercial paths on the image page.
- Homepage is broader than SD 3.5: Audio 3.0 and Brand Studio are current company leads. Do not treat SD 3.5 as the only 2026 Stability product.
- Editing APIs exist: The image page also lists edit/upscale/control tools.
Use Cases
- People who still have an SD 3.5 ComfyUI graph and need the license called out.
- People who thought the weights were fully MIT.
Limitation: We did not re-open a public per-image API dollar table. Confirm Stability Platform pricing before you quote a seat.
Pricing
stability.ai/stable-image and Hugging Face on 2026-08-17.
| Piece | Price | Notes from those pages |
|---|---|---|
| SD 3.5 weights | Community license | Gated HF card. Not MIT. |
| Self-hosted license / API | Confirm Stability pages | Image page has Get license / Use API CTAs. |
| Other 2026 leads | Confirm those products | Stable Audio 3.0, Brand Studio. |
If a leftover blog still says SD 3.5 is fully open and the only current Stability model, treat this table as the source.
Getting Started
- Open stability.ai/stable-image and the HF card before you download.
- Confirm FLUX 3 if you wanted a 2026 multimodal catalog.
- Confirm Brand Studio / Audio if you followed the company homepage.
- Do not call it fully MIT.
Frequently Asked Questions
Is SD 3.5 still Stability's image flagship?
The company homepage also leads with audio and Brand Studio.
Is it fully open source?
No. The HF license is stabilityai-ai-community.
Same as Flux.1 Dev?
Both are licensed open-weight stills from 2024. Live BFL catalog is FLUX 3 / FLUX.2.
Alternatives
- FLUX 3: Live BFL multimodal model.
- Flux.1 Dev: 2024 BFL open-weight stills.
- GPT Image 2: OpenAI stills.
Tips
- Quote community license, not MIT.
- Quote Large / Medium / Turbo from the image page.
- Confirm Audio 3.0 and Brand Studio before you say Stability is only SD 3.5.
Conclusion
Stable Diffusion 3.5 is a 2024 Stability stills family under a community license, not a fully MIT 2026 monopoly. Start at stability.ai/stable-image, then decide whether FLUX 3 already covers the model you need.
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