// Stable Diffusion / Stable Audio · Image generation
stable-diffusion-3-medium-diffusers: VRAM & local deployment
2.08B parameters. About 1.9 GB at 4-bit and 5.1 GB at BF16.
released 2024-06-12licence: Non-commercialmemory figures are estimates
01Specs
| Publisher | Stability AI · stabilityai |
|---|---|
| Family / series | Stable Diffusion / Stable Audio · stable-diffusion-3-medium |
| Type | Image generation (text-to-image) |
| Parameters | 2.08B Source: counted from official safetensors weights |
| Released weights | FP16 · 31.0 GBdownload |
| Licence | stabilityai-nc-research-community · Non-commercialResearch / non-commercial licence: commercial use is not allowed without a separate agreement. |
| Released | 2024-06-12 (Hugging Face repo created) |
| Access | Gated: accept the licence on Hugging Face before downloading. |
02How much VRAM it needs (estimate)
Image models: memory depends on resolution, batch and which text encoders are kept on the GPU; Diffusers / ComfyUI can offload parts to CPU. The weight size below is the main transformer only.
| Precision | Weights | Weights + overhead | Smallest GPU | Mac |
|---|---|---|---|---|
| BF16 / FP16 (original) | 4.2 GB | 5.1 GB | 8GB GPU | Mac 16GB |
| FP8 / INT8 / Q8_0 | 2.2 GB | 2.9 GB | 8GB GPU | Mac 16GB |
| 4-bit (Q4_K_M / AWQ / GPTQ-Int4) | 1.3 GB | 1.9 GB | 8GB GPU | Mac 16GB |
Bits per weight: BF16 16, FP8 8.5, 4-bit 4.85. “Fits” = total ≤ 90% of memory; Mac GPU can use ~2/3 of unified memory (≤36GB) or ~3/4 (larger). For MoE, all experts must be in memory, so size by total parameters. Method →
03How to run it
Only runtimes the publisher or the runtime’s official library names for this model.
- Diffusers — mentioned in the official model card
- ComfyUI — mentioned in the official model card
04Official repositories & quantised builds
3 official repo(s) from stabilityai.
05Other Stable Diffusion / Stable Audio models
All 10 →| Model | Params | 4-bit total | Released |
|---|---|---|---|
| stable-audio-3-medium | 2.31B | 2.0 GB | 2026-05-17 |
| stable-audio-3-small-music | 568M | 0.9 GB | 2026-05-17 |
| stable-audio-3-small-sfx | 568M | 0.9 GB | 2026-05-17 |
| stable-audio-open-small | 497M | 0.8 GB | 2025-05-12 |
| sv4d2.0 | — | — | 2025-02-20 |
| stable-diffusion-3.5-medium | 2.47B | 2.1 GB | 2024-10-29 |
| stable-diffusion-3.5-large | 8.15B | 5.9 GB | 2024-10-22 |
| stable-diffusion-3.5-large-turbo | 8.15B | 5.9 GB | 2024-10-22 |
06Sources
Data checked 2024-06-19. Parameters, context and licence are copied from the official repository; memory figures are our estimates.