Google Imagen 4 API - Runcrate

Google Imagen 4 excels at photorealism, accurate text rendering in images, and complex multi-part prompts. No Google Cloud account required.

Available models

Model	Speed	Quality	Best for
Imagen 4.0 Preview	Medium	High	General-purpose, balanced
Imagen 4.0 Fast	Fast	Good	Prototyping, real-time apps
Imagen 4.0 Ultra	Slow	Highest	Hero images, print assets

Basic generation

from runcrate import Runcrate

client = Runcrate(api_key="rc_live_YOUR_API_KEY")
image = client.models.generate_image(
    model="google/imagen-4.0-preview",
    prompt="A ceramic coffee mug on a wooden table, morning sunlight through a window, shallow depth of field",
)
image.data[0].save("coffee-mug.png")

import Runcrate from '@runcrate/sdk';

const rc = new Runcrate({ apiKey: 'rc_live_YOUR_API_KEY' });
const image = await rc.models.generateImage({
  model: 'google/imagen-4.0-preview',
  prompt: 'A ceramic coffee mug on a wooden table, morning sunlight, lifestyle photography',
});
await image.save('coffee-mug.png');

import { runcrate } from '@runcrate/ai';
import { generateImage } from 'ai';

const { image } = await generateImage({
  model: runcrate.imageModel('google/imagen-4.0-preview'),
  prompt: 'Ceramic coffee mug on wooden table, morning sunlight, lifestyle photography',
  size: '1024x1024',
});

Text in images

Imagen 4 renders text inside images more accurately than most diffusion models:

from runcrate import Runcrate

client = Runcrate(api_key="rc_live_YOUR_API_KEY")
image = client.models.generate_image(
    model="google/imagen-4.0-ultra",
    prompt='Neon sign on a brick wall reading "OPEN 24 HOURS" in blue and pink neon, dark alley, rain-slicked pavement',
)
image.data[0].save("neon-sign.png")

Fast tier for real-time apps

import Runcrate from '@runcrate/sdk';

const rc = new Runcrate({ apiKey: 'rc_live_YOUR_API_KEY' });
const image = await rc.models.generateImage({
  model: 'google/imagen-4.0-fast',
  prompt: 'Flat-lay photo of notebook, pen, and coffee cup on white desk',
  aspectRatio: '1:1',
});
await image.save('flatlay.png');

Batch generation

from runcrate import Runcrate
from concurrent.futures import ThreadPoolExecutor

client = Runcrate(api_key="rc_live_YOUR_API_KEY")
scenes = [
    {"file": "hero.png", "prompt": "Person wearing earbuds while jogging at sunrise, editorial photography"},
    {"file": "lifestyle.png", "prompt": "Hands holding smartphone in a cafe, warm tones"},
    {"file": "product.png", "prompt": "Earbuds in charging case on marble, product photography"},
]

def generate(s):
    client.models.generate_image(model="google/imagen-4.0-preview", prompt=s["prompt"], aspect_ratio="16:9").data[0].save(s["file"])

with ThreadPoolExecutor(max_workers=3) as pool:
    pool.map(generate, scenes)

Tips

Preview vs Fast vs Ultra. Fast for prototyping, Preview for balanced quality, Ultra for final hero assets.
Photorealism. Imagen 4 is photorealistic by default. Adding “photograph” reinforces this.
Text rendering. Wrap exact text in quotes within the prompt. Short phrases work best.
No Google Cloud needed. One Runcrate API key, standard billing.