// Stable Diffusion / Stable Audio · Text-to-speech / audio
stable-audio-open-small: VRAM & local deployment
497M parameters. About 0.8 GB at 4-bit and 1.6 GB at BF16.
released 2025-05-12licence: Commercial with conditionsmemory figures are estimates
01Specs
| Publisher | Stability AI · stabilityai |
|---|---|
| Family / series | Stable Diffusion / Stable Audio · stable-audio-open-small |
| Type | Text-to-speech / audio (text-to-audio) |
| Parameters | 497M Source: counted from official safetensors weights |
| Released weights | FP32 · 1.7 GBdownload |
| Licence | stability-ai-community · Commercial with conditionsCommercial use allowed under the publisher’s own licence terms (user caps, acceptable-use policy, attribution or region limits). Read it before shipping. |
| Released | 2025-05-12 (Hugging Face repo created) |
| Access | Gated: accept the licence on Hugging Face before downloading. |
02How much VRAM it needs (estimate)
Audio models are small; the weight size is close to the total memory needed.
| Precision | Weights | Weights + overhead | Smallest GPU | Mac |
|---|---|---|---|---|
| BF16 / FP16 (original) | 1.0 GB | 1.6 GB | 8GB GPU | Mac 16GB |
| FP8 / INT8 / Q8_0 | 0.5 GB | 1.1 GB | 8GB GPU | Mac 16GB |
| 4-bit (Q4_K_M / AWQ / GPTQ-Int4) | 0.3 GB | 0.8 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.
The official card does not name a runtime; see the repository.
04Official repositories & quantised builds
1 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 |
| 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 |
| stable-diffusion-3-medium-diffusers | 2.08B | 1.9 GB | 2024-06-12 |
06Sources
Data checked 2025-05-27. Parameters, context and licence are copied from the official repository; memory figures are our estimates.