Stable Diffusion 3.5 Largevs.Stable Image Ultra
Which one is better?
We have not tested Stable Image Ultra ourselves yet. Stable Image Ultra has no arena rating yet. Neither has an API price.
Same prompt, two images
Same task, the first image of each.
No image from the four fixed tasks for Stable Image Ultra yet.This model does not yet have a complete GraduallyBench run.
Result for “Typography and layout”:only Stable Diffusion 3.5 Large tested
What the rating looks at: Legible text, hierarchy, and composition.
“Ahead”: better in all three rating rounds. “Slightly ahead”: a higher value, but not in every round.
Missing image run for Stable Image Ultra
This model does not yet have a complete GraduallyBench run. Run the missing fixed tasks, archive the first output of each, and evaluate them blind.
DocumentationThe numbers at a glance
Stable Diffusion 3.5 Large
Rank 22 of 22
Stable Image Ultra
not in the arena
Stable Diffusion 3.5 Large
Rank 67 of 74
Stable Image Ultra
not tested yet
Stable Diffusion 3.5 Large
no API price
Stable Image Ultra
no API price
Ranks among the 22 image models with an arena rating and the 74 with a GraduallyBench run; prices compared with 28 models with an API price.
Stable Diffusion 3.5 Large
- Subscription
- n/a No plan in Germany names exactly this model.
- Via API
- No API price known. Access: API, local.
- License
- Open weights.
Stable Image Ultra
- Subscription
- n/a No plan in Germany names exactly this model.
- Via API
- No API price known. Access: API.
- Weights
- unknown.
Subscriptions only count plans that name exactly this model. Subscription prices include VAT, API prices are in dollars.
Arena rating (LMArena) from Oct 28, 2026 · GraduallyBench from Nov 1, 2026 · Subscription database from Sep 29, 2026 (34 days old)
All data side by side
The better value is bold. For ratings only when the gap is clear.
| Kennzahl | Stable Diffusion 3.5 Large | Stable Image Ultra |
|---|---|---|
| Ratings | ||
| Arena ratingfrom votes by users, higher is better | 938 | n/a |
| Arena rank | Rank 22 of 22 | n/a |
| Arena votesmore votes, a safer rating | 23,396 | n/a |
| GraduallyBenchour own rating, 0 to 100 | 18 | n/a |
| GraduallyBench by task | ||
| Typography and layoutLegible text, hierarchy, and composition | 11 | n/a |
| Product photographyMaterials, reflections, and fine details | 14 | n/a |
| Character and detailAnatomy, clothing, and spatial consistency | 23 | n/a |
| InfographicNumbers, labels, and visual organization | 23 | n/a |
| API price | ||
| Per imagelower is better | n/a | n/a |
| 100 images | n/a | n/a |
| Profile | ||
| Released | Oct 22, 2024 | n/a |
| Weightsopen means: runs locally | open | unknown |
| Lifecycle | no notice | Current API generation service based on Stable Diffusion 3.5 Large, not an independent checkpoint |
| Access | API, local | API |
| Parameters | 8.1 billion | not published |
| Largest output | 1 Megapixel | not consistently published |
| Plans in Germanynaming exactly this model | n/a | n/a |
API prices for one image at 1,024 × 1,024 pixels according to Artificial Analysis.
Sources: Stable Diffusion 3.5 Large model source (verified Aug 15, 2026) · Stable Image Ultra model source, status source (verified Nov 1, 2026)
Arena ratings by category
From blind votes on LMArena. “Ahead” means the lead is clear.
No shared arena score in the stored snapshot
The stored benchmark database contains no measurement for Stable Diffusion 3.5 Large and Stable Image Ultra from the same arena and category. Older model versions are not used as substitutes.
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