Image

Imagen 4 Fast API

Google DeepMind's speed-optimized tier in the Imagen 4 family (May 2025), built for rapid, high-volume, and interactive image generation at the lowest cost in the lineup.

Get API key Read the docs

~5s
Avg. generation: 2 credits
From

Imagen 4 Fast landscape thumbnail of a desert highway at sunset in warm tones

Playground

Try Imagen 4 Fast right here.

model: imagen-4-fast

Prompt

Aspect ratio

Resolution

Advanced settings

Output format

Estimated cost 2 credits · $0.02 Generate in Studio

Output

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

Pricing

Simple per-generation pricing.

2 credits per generation ≈ $0.02

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-fast

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

Avg. time ~5s

Quickstart

How to call the Imagen 4 Fast 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-fast 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-fast",
    "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-fast",
        "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-fast",
        "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 Fast 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-fast" · "imagen-4-fast"
imagenParams.image_size	string	Resolution Default:"1K" · "1K", "2K"
imagenParams.output_format	string	Output format Default:"jpg" · "jpg", "png"