Key facts
- Provider
- Stability AI
- Model family
- Stable Image
- Release date
- Not reported
- Status
- Current
- Access
- API only
- API model id
- Not reported
- Context window
- Not reported
- Max output
- Not reported
- Input
- text
- Output
- image
- Task families
- image
- Declared capabilities
- image generation
Stable Image Ultra pricing
Independent benchmark results
Scores come from independent evaluators that ran the model themselves, pinned to a dated snapshot. Rank is among current models in the same snapshot. Stability AI's own launch figures are listed under strengths with the publisher named, because they are not measured the same way.
No independent benchmark has published a result for Stable Image Ultra yet. It is still compared below on price, context and capabilities.
Strengths, cautions and best uses
Strengths
- Stability documents its flagship image service based on Stable Diffusion 3.5 Large
Cautions
- No exact compatible public benchmark snapshot is recorded
Best for
- Hosted high-detail image generation
Alternatives to Stable Image Ultra
The closest current imagemodels by price. The cheapest model that scores as well or better is listed first; failing that, the cheapest one within 3% of the benchmark's scale.
FLUX1.1 [pro]
- From Black Forest Labs
Gemini 3 Pro Image
- From Google
Gemini 3.1 Flash Image
- From Google
GPT Image 2
- From OpenAI
Stable Image Ultra FAQ
Is Stable Image Ultra open source or API only?
Stable Image Ultra is available through Stability AI's API only; its weights are not published.
What are the best alternatives to Stable Image Ultra?
The closest current alternatives by price and measured performance are FLUX1.1 [pro] (from Black Forest Labs), Gemini 3 Pro Image (from Google), Gemini 3.1 Flash Image (from Google) and GPT Image 2 (from OpenAI).
Sources
- Stability AI Developer Platform pricing · Stability AI · official · verified August 10, 2026
Cite this page
Van Data Team. "Stable Image Ultra Benchmarks, Pricing and Specs." AI Model Benchmark Dataset 2026-10-12. https://vandatateam.com/ai-model-benchmarks/stable-image-ultra
Reuse the data: JSON · CSV · or explore every model in the AI model benchmark comparison.
Production evaluation
Deciding whether Stable Image Ultra fits your workload?
Public benchmarks narrow the shortlist. We test the finalists on your own tasks, data and cost limits, then build the routing and review controls to run the winner in production.
- Evaluation cases and acceptance thresholds tied to real work
- Model routing, fallbacks and cost controls