KymaKyma
Google

Google

Imagen 4 Ultra

Google Imagen 4 Ultra is a text-to-image model optimized for maximum visual fidelity. Reach for it when generating print-ready assets, large displays, or premium campaign materials where detail outweighs generation speed.

Modalities

Text → Image

Price

$0.081 / image

Speed

slow

Pricing

Per image. Async generation; you only pay for successful renders.

$0.081 / image

When to use Imagen 4 Ultra

Updated 2026-07-31

Where this model earns its cost — and where it doesn't.

Imagen 4 Ultra is Google’s highest-fidelity text-to-image model. It generates images with fine-grained detail, accurate lighting, and high resolution suitable for physical print and large-format displays.

On Kyma, the model accepts text prompts and returns image outputs. It operates on a premium cost tier, bills per image, and has the slowest generation speed in the lineup. Prompt caching is enabled, billing repeated prompt prefixes at 10% of the standard input rate. Every request includes automatic failover and returns exact usage costs in the response payload.

The model does not support image inputs, reasoning, vision, or structured outputs. Generation latency is intentionally higher to prioritize quality, making it unsuitable for real-time or high-throughput workflows.

Print-ready marketing assets

Generate high-resolution visuals that maintain sharpness and color accuracy at physical print sizes.

Hero banner generation

Create detailed background images for website headers and premium digital campaigns.

High-resolution product mockups

Produce detailed visual assets requiring precise texture, lighting, and material representation.

Archival quality illustrations

Render long-form creative projects where maximum detail is prioritized over generation speed.

Not ideal for: Real-time interactive applications, rapid prototyping, or high-volume batch generation where low latency and cost efficiency are primary constraints.

Quick start

Up and running in under two minutes.

  1. 1

    Create an API key

    Sign up and grab a key from the dashboard — $0.50 free credit, no card required.

    Get API key →
  2. 2

    Make your first request

    Submit a generation job and poll until it succeeds.

    curl https://kymaapi.com/v1/images/generations \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "imagen-4-ultra",
    "prompt": "A serene mountain lake at sunrise, photorealistic",
    "n": 1
  }'
# Response: { "id": "img_...", "status": "queued" }
# Poll: GET /v1/jobs/{id} until status="succeeded"

FAQ

Common questions about this model.

How much does Imagen 4 Ultra cost?

$0.081 per image. Per image. Async generation; you only pay for successful renders.

How do I use Imagen 4 Ultra?

Kyma is OpenAI-compatible: point your SDK's base URL at https://kymaapi.com/v1, use your Kyma API key, and set the model to imagen-4-ultra. Signing up is free and includes $0.50 of credit — no card required.

Does this model support image-to-image or reference inputs?

No, it only accepts text prompts and outputs images.

How does prompt caching work for this model?

Repeated prompt prefixes are billed at 10% of the standard input rate, reducing costs for workflows with consistent system prompts.

What happens if the serving path degrades during generation?

Kyma automatically reroutes the request to a healthy path via built-in failover, so you do not need to handle retries in your code.

Start with $0.50 free credit — no card required.Create account →

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