Imagen 4.0 Fast Generate API

google/imagen-4.0-fast-generate-001
Imagen 4.0 Fast Generate-001 supports image resolutions up to 2048×2048 pixels with multiple aspect ratios and handles complex prompts up to 480 tokens, enabling versatile use cases from marketing to creative projects.
Output
$0.026 / gen (variable)
Released
Oct 13, 2025

How to use Imagen 4.0 Fast Generate API

Install any OpenAI-compatible SDK, point it at api.aimlapi.com/v1, and set the model to google/imagen-4.0-fast-generate-001.
import requests

r = requests.post(
    "https://api.aimlapi.com/v1/images/generations",
    headers={"Authorization": "Bearer " + AIMLAPI_KEY},
    json={
      "model": "google/imagen-4.0-fast-generate-001",
      "prompt": "A cat holding a sign that says hello"
    },
)
print(r.json())
const r = await fetch("https://api.aimlapi.com/v1/images/generations", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.AIMLAPI_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "model": "google/imagen-4.0-fast-generate-001",
    "prompt": "A cat holding a sign that says hello"
  }),
});
console.log(await r.json());
curl -X POST https://api.aimlapi.com/v1/images/generations \
  -H "Authorization: Bearer $AIMLAPI_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"google/imagen-4.0-fast-generate-001","prompt":"A cat holding a sign that says hello"}'

OpenAI-compatible — swap the base URL and it works with your existing SDK.

Imagen 4.0 Fast Generate API Pricing

TypePrice
Output
$0.026 / gen (variable)

Imagen 4.0 Fast Generate Benchmarks

BenchmarkScoreWhat it measuresSourceRetrieved
Text-to-Image Arena
1072 (Elo)
Human preference Elo from blind pairwise comparisons of generated images, measured independently by Artificial AnalysisSourceJuly 12, 2026

Imagen 4.0 Fast Generate vs other models

ModelInputOutputContextBest for
$0.026 / gen (variable)
Image generation at scale
$0.325 / 1M tokens
$78 / 1M tokens
128K tokens
Image generation at scale
$6.5 / 1M tokens
$39 / 1M tokens
Image generation at scale
Image generation at scale
$0.0195 / MP (variable)
Image generation at scale

Frequently asked questions

Imagen 4.0 Fast Generate takes image, text as input and returns image.

Imagen 4.0 Fast Generate became available on October 13, 2025.

Imagen 4.0 Fast Generate is priced at $0.026 / gen (variable).

Imagen 4.0 Fast Generate is billed per generation — a fixed charge per output rather than by prompt length.

Yes, Imagen 4.0 Fast Generate accepts image input as well as a text prompt.

Imagen 4.0 Fast Generate was built by Google.

Send a request to https://api.aimlapi.com/v1/images/generations with google/imagen-4.0-fast-generate-001 as the model id.

Yes. Imagen 4.0 Fast Generate is served through AI/ML API, so the same key and endpoint format used for other models applies.

It is classified as an image generation model.

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