Documentation Index
Fetch the complete documentation index at: https://docs.kymaapi.com/llms.txt
Use this file to discover all available pages before exploring further.
Overview
imagen-4-ultra is Google’s top-fidelity Imagen 4 tier — highest detail, slowest generation. Use for print-ready hero assets, large displays, premium campaigns where fidelity beats cost.
Lives in the Imagen 4 family with imagen-4 (default) and imagen-4-fast (drafts). Same style language.
Specs
| Field | Value |
|---|
| Model ID | imagen-4-ultra |
| Creator | Google |
| Backend | Vertex AI (imagen-4.0-ultra-generate-001, us-central1) |
| Best for | Print-ready hero assets, large displays, premium campaigns |
| Aspect ratios | 1:1 (default), 3:4, 4:3, 16:9, 9:16 |
Sample count n | 1–4 |
| Pricing mode | Flat per image |
| Default latency | ~20–40s |
| Output | Blob-hosted URL (Vercel CDN) |
Pricing
| Variant | Provider cost | Kyma list |
|---|
imagen-4-ultra | $0.060 | $0.081 |
GET https://kymaapi.com/v1/pricing.
Compared to other image models on Kyma
| Strength | imagen-4-ultra | imagen-4 | flux-2-pro | recraft-v4-pro |
|---|
| Top photoreal | ★★★★★ | ★★★★ | ★★★★★ | ★★★★ |
| Print fidelity | ★★★★★ | ★★★ | ★★★★ | ★★★★★ |
| Speed | ★★★ | ★★★★ | ★★★★ | ★★★★ |
| Cost | ★★ | ★★★★ | ★★★★ | ★★ |
Use this when
- The deliverable is print-ready (poster, billboard, packaging, magazine).
- The image is a hero asset with downstream multi-format reuse.
- Fidelity is non-negotiable.
Pick something else when
Example
curl -X POST https://kymaapi.com/v1/images/generations \
-H "Authorization: Bearer $KYMA_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "imagen-4-ultra",
"prompt": "A cinematic editorial fashion portrait, soft natural light, 35mm film grain, magazine cover quality",
"size": "9:16",
"n": 1
}'
GET /v1/jobs/{id} until succeeded.
