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. Rechecked 2026-08-17: stability.ai/stable-image still calls SD 3.5 our most powerful image model yet, with Large, Turbo, and Medium license/API rows. 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. Drop leftover fully open source, commercial-use-for-anyone.

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). Recheck those cards; do not invent new parameter counts.
• 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. Recheck the API catalog; do not invent dollars.

Use Cases

• People who still have an SD 3.5 ComfyUI graph and need the license called out.
• People comparing leftover SD 3.5 to FLUX.2 / FLUX 3.
• People who thought the weights were fully MIT.

Limitation: We did not re-open a public per-image API dollar table. Recheck Stability Platform pricing before you quote a seat.

Pricing

stability.ai/stable-image and Hugging Face on 2026-08-17.

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

1. Open stability.ai/stable-image and the HF card before you download.
2. Recheck FLUX 3 if you wanted a 2026 multimodal catalog.
3. Recheck Brand Studio / Audio if you followed the company homepage.
4. Do not call it fully MIT.

Frequently Asked Questions

Is SD 3.5 still Stability's image flagship?

The image page we opened still says most powerful image model yet. 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

1. Quote community license, not MIT.
2. Quote Large / Medium / Turbo from the image page.
3. Recheck 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.