Stability AIImage model
Stable Image Ultra
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Summary
Stability lists Stable Image Ultra as an image-generation service. Stability offers Ultra as a separate API generation route and describes it as based on Stable Diffusion 3.5 Large.
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All specifications
Architecture
- Checkpoint status
- Document it as a product/API variant, not as a proven independent model family.
- Source: Checkpoint status
Licence and access
- Lifecycle
- Current API generation service based on Stable Diffusion 3.5 Large, not an independent checkpoint
- Source: Lifecycle
Further details
- API route
- Stable Image Ultra is a separately selectable API generation route. The provider describes Ultra as based on Stable Diffusion 3.5 Large.
- Source: API route
Sources and data date
| Type | Evidence and data date |
|---|---|
| Additional source | Stability AI (retrieved November 1, 2026) · Stability AI · Editorial description reviewed November 1, 2026 |
| Additional source | Stability AI (retrieved November 1, 2026) |