Google Imagen4 Ultra
Google Imagen4 Ultra is Kyeo AI's text-only, single-image workflow at 12 credits per request. It accepts a main prompt of up to 5,000 characters, an optional negative prompt, five aspect ratios, and a text seed. `Ultra` is a workflow name, not a Kyeo guarantee that it outperforms the other Imagen4 routes.
At a glance
What is this model like?
Kyeo sends the main prompt and any completed `negative_prompt`, `aspect_ratio`, and text `seed` to `google/imagen4-ultra`; it does not send an image. The upstream interface still lists this workflow. Google's direct Imagen 4 Ultra workflow has a June 30, 2026 discontinuation date, while the upstream interface does not say whether it uses that model, another upstream service, or its own parameter conversion.
Key facts
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Also known as
The same model may appear under different names across documentation and community discussions; this list keeps them easy to search and compare.
Common search intents
These questions and keywords combine public references with common creative use cases to help you choose faster.
Selection guide
Use these decision points when choosing a model.
If you saved the same main prompt, ratio, and exclusions from Imagen4 or Fast, submit them here and record the actual differences.
This route accepts no image and exposes no output count, size, format, or safety settings. Choose a model with explicit controls when you need to preserve a source, edit a region, upscale, or select a file format.
Kyeo does not yet reject longer values, so hold every other field constant and change one variable at a time.
Popular comparisons
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Model comparison
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Practical usage insights
Practical observations based on real creative workflows.
Ultra is a workflow name, not a quality benchmark
Google's direct Ultra endpoint reached discontinuation
Capabilities
Google Imagen: Clear input options
Google Imagen: Practical controls
Google Imagen: Transparent credit use
Use cases
Same-input comparison with Imagen4
Five fixed-ratio checks
Negative-prompt and seed behavior
Prompt tips
Lead with content that must be visible
Control negative-prompt and seed length
Freeze all inputs when comparing routes
Strengths
Limitations
Adjustable parameters
Quickly assess whether this model matches your workflow.
Credit usage
Kyeo currently charges 12 credits for each single-image Google Imagen4 Ultra request.
Before batch generation, run an A/B test with the same assets across the current model and alternatives to validate quality and avoid wasting credits.
FAQ
Related models
Compare these similar candidates before deciding.
Google Imagen4
Google Imagen4 is Kyeo AI's text-only, single-image workflow at 8 credits per request. It accepts a main prompt of up to 5,000 characters, an optional negative prompt, five aspect ratios, and a text seed; the default ratio is 1:1. `Imagen4` is the upstream workflow name, not a quality guarantee.
Google Imagen4 Fast
Google Imagen4 Fast is Kyeo AI's text-only, single-image workflow at 4 credits per request. It accepts a main prompt of up to 5,000 characters, an optional negative prompt, five aspect ratios, and a seed; the default ratio is 16:9. `Fast` is a workflow name, not a measured promise about latency or quality.
4o Image
4o Image is Kyeo AI's text-to-image implementation of the upstream `gpt4o image generation` workflow. It offers `1:1 / 3:2 / 2:3`, costs a fixed 3 credits, and accepts no reference images.
Sources
Content is based on model documentation, feature references, and the settings available on Kyeo AI.
This page treats Kyeo's current configuration, request workflow, and upstream schema as the available scope. `google/imagen4-ultra` accepts text only, limits the main prompt to 5,000 characters, forwards `negative_prompt`, `aspect_ratio`, and a text `seed`, produces one image under the current configuration, and costs 12 credits. The upstream schema also offers an `auto` ratio and limits the negative prompt and seed to 5,000 and 500 characters respectively. Google's direct `imagen-4.0-ultra-generate-001` documentation says negative prompts are unsupported and gives 2026-06-30 as the workflow's discontinuation date.
Google documents direct `imagen-4.0-ultra-generate-001` as text-to-image with five ratios, PNG/JPEG, up to four direct outputs, and 1K/2K resolutions; negative prompting and image editing are unsupported.
The Ultra model guide also gives June 30, 2026 as its discontinuation date.
Google's direct documentation establishes Imagen 4 family input, output, and lifecycle context.
The upstream schema documents a 5,000-character main prompt and negative prompt, six aspect ratios including `auto`, and a text seed of up to 500 characters; the example workflow is `google/imagen4-ultra`.
Kyeo currently accepts text only, caps the main prompt at 5,000 characters, exposes five fixed ratios with a 1:1 default and a text seed, produces one image, and charges 12 credits.