Image

Imagen 4 Ultra API

Google DeepMind's highest-fidelity tier in the Imagen 4 family (May 2025), built for final, production-ready assets where maximum detail and strict prompt adherence matter most.

Get API key Read the docs

~14s
Avg. generation: 8 credits
From

Imagen 4 Ultra photorealistic beauty close-up of a model with natural skin texture in soft studio lighting

Playground

Try Imagen 4 Ultra right here.

model: imagen-4-ultra

Prompt

Aspect ratio

Resolution

Advanced settings

Output format

Estimated cost 8 credits · $0.08 Generate in Studio

Output

Your output lands here. Hit generate to run this request in Studio.

Pricing

Simple per-generation pricing.

8 credits per generation ≈ $0.08

You only pay for successful generations. Failed jobs are refunded automatically.
One credit balance across every model on Apiframe, no per-model plans.
Start with free credits. No subscription required.
Volume discounts on larger plans.

See plans and credit packs

Specs

At a glance.

Provider Google

Model ID imagen-4-ultra

Aspect ratios 1:1, 9:16, 16:9, 3:4, 4:3

Avg. time ~14s

Quickstart

How to call the Imagen 4 Ultra API.

Send one POST /v2/images/generate request with your API key. The call returns a jobId you can poll, or pass a webhook_url and the result is pushed to you the moment it's ready.

Swap imagen-4-ultra for any other model and nothing else changes.

Get API key Read the docs

generate.js

const response = await fetch("https://api.apiframe.ai/v2/images/generate", {
  method: "POST",
  headers: {
    "X-API-Key": "afk_your_api_key_here",
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "prompt": "a sleek silver sports car on a coastal highway at sunset, hyper-realistic",
    "model": "imagen-4-ultra",
    "imagenParams": {
      "image_size": "1K",
      "output_format": "jpg"
    }
  }),
});
const { jobId } = await response.json();
console.log(jobId);

import requests

response = requests.post(
    "https://api.apiframe.ai/v2/images/generate",
    headers={
        "X-API-Key": "afk_your_api_key_here",
        "Content-Type": "application/json",
    },
    json={
        "prompt": "a sleek silver sports car on a coastal highway at sunset, hyper-realistic",
        "model": "imagen-4-ultra",
        "imagenParams": {
            "image_size": "1K",
            "output_format": "jpg"
        }
    },
)
print(response.json())  # { "jobId": "...", "status": "QUEUED" }

curl -X POST https://api.apiframe.ai/v2/images/generate \
  -H "X-API-Key: afk_your_api_key_here" \
  -H "Content-Type: application/json" \
  -d '{
        "prompt": "a sleek silver sports car on a coastal highway at sunset, hyper-realistic",
        "model": "imagen-4-ultra",
        "imagenParams": {
            "image_size": "1K",
            "output_format": "jpg"
        }
    }'

let job;
do {
  await new Promise((r) => setTimeout(r, 2000));
  job = await fetch("https://api.apiframe.ai/v2/jobs/JOB_ID", {
    headers: { "X-API-Key": "afk_your_api_key_here" },
  }).then((r) => r.json());
} while (job.status !== "COMPLETED" && job.status !== "FAILED");
console.log(job.result);

import requests, time

while True:
    job = requests.get(
        "https://api.apiframe.ai/v2/jobs/JOB_ID",
        headers={"X-API-Key": "afk_your_api_key_here"},
    ).json()
    if job["status"] in ("COMPLETED", "FAILED"):
        break
    time.sleep(2)
print(job["result"])

curl https://api.apiframe.ai/v2/jobs/JOB_ID \
  -H "X-API-Key: afk_your_api_key_here"

Input schema

Every field Imagen 4 Ultra accepts, with types and defaults. The full reference lives in the docs.

Field	Type	Description
prompt required	string	Text description of what to generate.
model required	string	The model identifier for this endpoint. Default:"imagen-4-ultra" · "imagen-4-ultra"
imagenParams.image_size	string	Resolution Default:"1K" · "1K", "2K"
imagenParams.output_format	string	Output format Default:"jpg" · "jpg", "png"

Imagen versions

Every Imagen image model on Apiframe. Switch with one parameter.

Imagen 4 Ultra questions

What teams ask before shipping with Imagen 4 Ultra. Everything else lives in the docs.

What is Imagen 4 Ultra?

The highest-quality tier of Google's Imagen 4 family, released in May 2025 and built for final, production-grade images.

How is it different from Imagen 4 and Imagen 4 Fast?

Ultra offers the most detail and the strictest prompt adherence, priced at 8 credits ($0.08) per image versus 6 credits ($0.06) for Standard and 3 credits ($0.03) for Fast.

What resolution does it produce?

Native 2K, at 2048x2048.

What is it best for?

Brand-critical marketing, professional commercial assets, and realistic imagery of people.

Does it watermark generated images?

Yes. Every image carries Google's invisible SynthID watermark.

Where can you access it?

Through Apiframe, as well as the Gemini API, Google AI Studio, and Vertex AI.