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Imagen 4 API — Google Imagen 4.0 Text-to-Image
Imagen 4.0 is Google's flagship text-to-image model. Five aspect ratios, one flat per-image rate, async-first JSON contract — drop it into the same /api/v1/images/generations endpoint you already use.
Input
English or Chinese · detailed prompts produce better Imagen 4 results
1:1 · 4:3 · 3:4 · 16:9 · 9:16 — pick by surface
Fixed at 1 on Imagen 4 — send multiple requests for variations
Result
Try one of these prompts
What you can build with this model
Real-world workflows and production use cases you can build and ship with this model.
Hero shots at any aspect ratio
Imagen 4 covers the five aspect ratios most product surfaces ship — 1:1 for grid tiles, 16:9 and 9:16 for hero / mobile, 4:3 and 3:4 for editorial. One prompt template, five ratios, one flat rate. The same scene description carries across ratios without recomposition, which keeps a campaign visually consistent across web, app, and social.
Generate a hero
Editorial and marketing creative
Imagen 4's prompt adherence and lighting handle editorial-grade product photos, marketing banners, and brand moodboards. Describe the subject, the surface, the light, the lens — the render lands with composition you can drop straight into a layout. Async submit returns a task_id in milliseconds so a creative pipeline isn't blocked waiting on render.
Concept art and ideation
Send Imagen 4 a free-form scene description — a city skyline, a character beat, a landscape under a specific light — and it returns a single high-fidelity frame. Because Imagen 4 is text-to-image only, the result is purely prompt-driven; ideal for early-stage concept work where you haven't picked a reference yet.
Pricing
Credit-based — 1 credit = $0.001 USD. Pay only for completed generations.
| Category | Unit | Price |
|---|---|---|
| Per image | ||
| Any aspect ratio | 1 image | $0.046 46 credits |
Why reAPI
Google Imagen 4 on one endpoint
Imagen 4 ships through the same /api/v1/images/generations endpoint you already use for the rest of your image stack. One JSON shape, one auth header, one credit ledger. Send model: imagen-4-0 with a prompt and a size and the task lands the same way every other reApi image task does.
Flat per-image rate — no hidden tiers
1 credit equals $0.001 USD. Imagen 4 is a flat per-image rate regardless of aspect ratio. No quality tier, no resolution tier, no n multiplier — the spec accepts exactly one image per request. The estimator on this page is the actual charge.
Async-first for production stacks
Submit an Imagen 4 task, get a task_id back, poll until done. Failed and moderated requests are not charged. Imagen 4 fits the same task plumbing as every other reApi model — drop it in, the lifecycle is identical.
Integrate Imagen 4 in three steps
- step 01
Create an API key
Sign up at reApi and grab a key. Free signup credits cover dozens of Imagen 4 generations, enough to validate the prompt → asset path before topping up.
Open - step 02
Submit a generation
POST to /api/v1/images/generations with model: imagen-4-0, a prompt, and an optional size. Imagen 4 returns a task_id immediately — your handler is free to move on.
Open - step 03
Poll the result
GET /api/v1/tasks/:id until status is completed. The Imagen 4 response carries an image URL valid for 24 hours; mirror to your own storage if you need it longer.
Open
Frequently asked questions
Common questions about this model.
Imagen 4 is Google's flagship text-to-image model. It renders at five aspect ratios — 1:1, 4:3, 3:4, 16:9, 9:16 — and accepts English or Chinese prompts. On reApi it ships as model id imagen-4-0 on the OpenAI-compatible /api/v1/images/generations endpoint, billed at a flat per-image rate. See current rate in the pricing table on this page.
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start building
Ready to ship?
Try it in the playground or grab an API key to integrate now.