Model reference · open weights
stable-diffusion-3.5-medium-amdnpu is an open-weight image model from Stability AI. stable-diffusion-3.5-medium-amdnpu (BF16) weighs 264 MB; the smallest configuration that runs it is RTX 3060 12 GB.
Summary of the stabilityai/stable-diffusion-3.5-medium-amdnpu model card, 2026-10-01
What it is
| Released by | Stability AI |
|---|---|
| Released | 2026-05-01 |
| VRAM | 264 MB for the weights |
What it runs on
| Card | One image | Memory |
|---|---|---|
| RTX 3060 12 GB | fits | 11.6 GB |
| RTX 4060 Ti 16 GB | fits | 15.4 GB |
| RTX 3090 24 GB | fits | 23.4 GB |
| RTX 4090 24 GB | fits | 23.4 GB |
| RTX 5090 32 GB | fits | 31.0 GB |
| L40S 48 GB | fits | 44.0 GB |
| A100 80 GB | fits | 78.2 GB |
| H100 80 GB | fits | 78.1 GB |
| RTX PRO 6000 Blackwell 96 GB | fits | 93.8 GB |
| DGX Spark (GB10) 128 GB unified | fits | 107 GB |
| H200 141 GB | fits | 138 GB |
| B200 180 GB | fits | 176 GB |
From the model card
"Stable Diffusion 3.5 Medium is an improved version of SD3 Medium, featuring better prompt adherence, better generation quality, and more diverse outputs. SD3.5 Medium is a Multimodal Diffusion Transformer (MMDiT) text-to-image model that features improved image quality, typography, and prompt understanding." (stabilityai/stable-diffusion-3.5-medium)
This version of the model has been optimized to run on AMD NPUs.
For more information, refer to the original model card under stabilityai/stable-diffusion-3.5-medium.
| Model Details | Description |
|---|---|
| Person or organization developing model | AMD |
| Original model authors | Stability AI |
| Model date | February 2026 |
| Model version | 1.8.0 |
| Model type | Diffusion-based text-to-image generation model |
| Information about training algorithms, parameters, fairness constraints or other applied approaches, and features | This is a model that can be used to generate and modify images based on text prompts. |
| License | Stability AI Community |
| Where to send questions or comments about the model | Community Tab and AMD Developer Community Discord |
To get started with this model, visit github.com/amd/sd-sandbox.
AMD is committed to conducting our business in a fair, ethical and honest manner and in compliance with all applicable laws, rules and regulations. You can find out more at the AMD Ethics and Compliance page.
Please visit the original model card for more details: stabilityai/stable-diffusion-3.5-medium.
Quoted from the model card on Hugging Face. The full card is behind the Hugging Face link above.
How it works
Running it yourself
Rent a machine by the hour. ComfyUI is installed on it. Open ComfyUI through the tunnel, load the workflow from the model's card on Hugging Face, and choose this file in its text encoder loader.
# on your rented machine (the ssh line is on its page in the console)
# get REPO FILE FOLDER: one file into /workspace/models/FOLDER, where ComfyUI loads it from
get() { hf download "$1" "$2" --local-dir /workspace/hf-files && mkdir -p "/workspace/models/$3" && mv "/workspace/hf-files/$2" "/workspace/models/$3/$4"; }
# the model (251 MB)
get stabilityai/stable-diffusion-3.5-medium-amdnpu common/text_encoder_3_gptq_v2/serialized_quantized_t5-v1_1-xxl_w4_g128_gptq.safetensors text_encoders
start-comfyui# on your computer, in a second terminal: ComfyUI in your browser at http://localhost:8188
# HOST and PORT are your machine's, from its page in the console
ssh -L 8188:localhost:8188 dev@HOST -p PORT