As of: 2026-11-13 13:49 CET.
Researched and written by AI agents (Claude Opus 5.5 in Claude Code), with a human editor. How we work: https://postcutoff.com/about/
Canonical page: https://postcutoff.com/m/stable-diffusion-3-5-large/

# Stable Diffusion 3.5 Large

Stability AI, Stable Diffusion 3.5 family. Status: current. Type: image generation. Released: 2024-10-22.

## How to call it

| Provider | Model id | Endpoint | Docs |
|---|---|---|---|
| Stability AI API | `sd3.5-large` | https://api.stability.ai/v2beta/stable-image/generate/sd3 | https://platform.stability.ai/docs/api-reference |
| Hugging Face |  |  | https://huggingface.co/stabilityai/stable-diffusion-3.5-large |
| Hugging Face (Large Turbo) |  |  | https://huggingface.co/stabilityai/stable-diffusion-3.5-large-turbo |
| Hugging Face (Medium) |  |  | https://huggingface.co/stabilityai/stable-diffusion-3.5-medium |

## Pricing

- Price not published.
- Last checked: not recorded

## Specs

- Input: text, image
- Output: image
- Context window: not published
- Max output: not published
- Open weights: yes
- Licence: Stability AI Community License

## Where it stands

- Newer image generation models in the registry since its release: 28. The 5 newest:
  - GPT Image 2.6 Flare (2026-11-04) https://postcutoff.com/m/gpt-image-2-6-flare/
  - GPT Image 2.6 Sunburst (2026-11-04) https://postcutoff.com/m/gpt-image-2-6-sunburst/
  - MOSS-Image (2026-10-16) https://postcutoff.com/m/moss-image/
  - FLUX 3 Image Klein (2026-10-15) https://postcutoff.com/m/flux-3-image-klein/
  - Krea 3 (Fast / High / Ultra modes) (2026-10-15) https://postcutoff.com/m/krea-3/
- Weights are public. Licence: Stability AI Community License. See the licence for commercial terms.

## What stands out

- Open MMDiT weights, free for small businesses: 8B Multimodal Diffusion Transformer with open weights under a Community License free for commercial use under $1M annual revenue. Source: https://huggingface.co/stabilityai/stable-diffusion-3.5-large
- Broad hardware optimization (found after launch): Official TensorRT/FP8 (NVIDIA, ~2x faster, 40% less memory), ONNX AMD GPU and AMD NPU builds released later. Source: https://stability.ai/news-updates

## Notes

Still Stability's latest image model family (no official SD4 as of 2026-09; SD4 'news' articles are unverified). API model values for /generate/sd3: sd3.5-large, sd3.5-large-turbo, sd3.5-medium (from third-party docs; official API ref is JS-rendered, not verified). Pricing (credits) not verified.

Main open-weight Stability image model; widely used with ComfyUI/diffusers and fine-tunes.

```bash
curl -X POST https://api.stability.ai/v2beta/stable-image/generate/sd3 -H "Authorization: Bearer $STABILITY_API_KEY" -H "Accept: image/*" \
  -F prompt="a lighthouse at dusk, oil painting" -F model=sd3.5-large -o out.png
```

Sources: https://huggingface.co/stabilityai/stable-diffusion-3.5-large , https://stability.ai/news-updates , https://platform.stability.ai/docs/api-reference

Model page: https://postcutoff.com/m/stable-diffusion-3-5-large/