Subject
Scene
Light and camera
01
Write the prompt
Describe the subject, scene, material, light and any exact text in 1–5,000 characters. Imagen 4 suits turning a settled direction into a reviewable image.
Imagen 4 API turns text into product, lifestyle and campaign images in six aspect ratios. Try it online and review examples, live pricing and API examples.
Provider: Google
Category: image generation
Status: In progress
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Imagen 4
NewComing soonby GoogleImage
Imagen 4 API turns text into product, lifestyle and campaign images in six aspect ratios. Try it online and review examples, live pricing and API examples.
Integration in progress
Imagen 4 is coming to HiAPI
From product campaigns to detailed scenes
Browse results across different aspect ratios, complete prompts, and visual detail.
Related image models
Choose an adjacent model by task, output tier, and reference-image needs.
Fast drafts
Imagen 4 Fast
Faster output for many drafts of composition and color.
Highest detail
Imagen 4 Ultra
Richer detail and closer prompt adherence, for final delivery.
Generation and editing
Nano Banana 2.1
Generates from text and also edits with reference images.
High-detail commercial images
Nano Banana Pro
Up to 4K output with references, for high-detail commercial images.
About Imagen 4
Imagen 4 API turns text into product, lifestyle and campaign images in six aspect ratios. Try it online and review examples, live pricing and API examples.
The Playground and API use the same model ID: Google-Imagen4. This endpoint accepts text prompts only; reference-image editing uses the separate Image-to-Image route.
- Provider
- Task
- Text-to-Image
- References
- Not supported
- Pricing
- View live pricing
Model specifications
Choose inputs and output settings for your creative goal with Imagen 4.
- Reference images
- Not supported
- Aspect ratios
- 1:116:99:163:44:3auto
- Negative prompt
- Optional, up to 5,000 characters
- Seed
- Optional string, up to 500 characters
- Per request
- 1 image
- Prompt length
- 1–5,000 characters
- Pricing
- View live pricing
Aspect ratio, negative prompt and seed do not change how a task is billed; confirm the charge with the live price and the task record.
How to use Imagen 4
Choose the destination and aspect ratio before composing subject, scene, material, light, and text.
Default ratio
16:9
Optional
auto
02
Pick aspect_ratio; add negative_prompt and seed if needed
Choose aspect_ratio from 1:1, 16:9, 9:16, 3:4, 4:3 or auto (this page defaults to 16:9). Use negative_prompt for what to exclude; seed is an optional string (up to 500 characters).
Playground
POST /v1/tasks
03
Validate in Playground, then call /v1/tasks
Confirm the result in the Playground, then send the same inputs and model ID to POST /v1/tasks and use the returned taskId to fetch the Imagen 4 image.
API Quickstart
Copy a minimal request below. See Docs for parameters, callbacks, task retrieval, and errors.
- Endpoint
POST /v1/tasks- Model ID
Google-Imagen4
cURL
curl -X POST "https://api.hiapi.ai/v1/tasks" \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "Google-Imagen4",
"input": {
"prompt": "Create a premium skincare product photo for a landing-page hero. Show one frosted glass bottle on natural stone beside still water and green botanicals. Keep the bottle centered with empty space on the left for a headline. Warm daylight and soft shadows; the result should look like calm studio photography. Do not add logos or text.",
"aspect_ratio": "16:9"
}
}'The create request immediately returns a taskId; image generation continues asynchronously.
IMAGEN 4 · TEXT TO IMAGE
Imagen 4 turns a settled visual direction into a reviewable image
Imagen 4 is a text-to-image model that handles product stills, lifestyle scenes and documentary portraits, with 6 aspect ratios and prompts up to 5,000 characters. It suits product heroes, campaign drafts and editorial images.
6 aspect ratios16:9 defaultNegative promptString seed
Explore the model ↓
IMAGEN 4 · TEXT TO IMAGE
About Imagen 4
aspect_ratio is required: 1:1, 16:9, 9:16, 3:4, 4:3 or auto. This page defaults to 16:9, ready for landscape ad slots and landing-page heroes.
negative_prompt excludes unwanted elements; seed is a string of up to 500 characters that helps compare prompt changes. Each request returns one image and takes no reference images.
After confirming the image in the Playground, send the same inputs to HiAPI's POST /v1/tasks and fetch the image with the taskId.
What Imagen 4 can do
Each capability comes with a real result; images generated on the test frontend show the prompt as submitted.
Make the product the visual anchor
The product, stone, water and plants share one visual relationship, with the product always the clearest element. State the subject and its position first, then add light, material and negative space, reserving room in the prompt when a headline is needed. It suits product heroes, landing-page headers and social ad drafts.
Tell person and place in a 3:4 portrait
One vertical frame covers the person, the action and the setting. Imagen 4 offers 6 aspect ratios; set aspect_ratio to 3:4 and state what the person is doing, where, and in what light. It suits editorial features, brand stories and portrait posters.
Elderly fisherman mending nets on a harbor pier; golden hour; documentary portrait
Set quoted text into a poster
The quoted headline becomes the centerpiece of the poster layout. Put the exact words in quotes, state position, size and style, and exclude other text with negative_prompt; this result spelled JAZZ as JAZZZ, so always zoom in before delivery. It suits event posters, cover drafts and social title cards.
Hand-drawn style poster with the text "SUMMER JAZZ NIGHT" in bold letters; saxophone illustration; warm colors
Build a lifestyle scene from environmental detail
The table, book, linen, vase and interior light form one coherent lifestyle scene. Name each object and where it sits relative to the others, then describe one light direction and color temperature. It suits editorial images, brand stories and seasonal campaigns.
Where Imagen 4 fits
Brand and product visuals
Product heroes, event covers and ad directions.
Outdoor and campaign frames
Keep a person, the weather and the action in one outdoor shot.
Design proposals
Turn style, material and scene ideas into images teams can discuss.
Batch content workflows
Store prompts and ratios, submit in batches through /v1/tasks and record each taskId.
When to choose Imagen 4
Choose it for everyday product and content images once the direction is roughly set: a clear subject and light give a reviewable image. If speed and volume matter more, look at Imagen 4 Fast; when the final needs more detail, look at Imagen 4 Ultra.
| Item | Imagen 4 | Imagen 4 Fast | Imagen 4 Ultra |
|---|---|---|---|
| Focus | Everyday production | Fast drafts | Highest detail |
| Best stage | Reviewable images once a direction is set | Exploration and batch versions | Final delivery |
| Model ID | Google-Imagen4 | imagen4-fast | imagen4-ultra |
| Default ratio | 16:9 | 16:9 | 1:1 |
| seed | String, ≤500 characters | Integer | String, ≤500 characters |
| References | Not supported | Not supported | Not supported |
| Per request | 1 image | 1 image | 1 image |
The three models share almost the same inputs; only seed type and default ratio differ, so switching is a change of model.
Pricing
Billed per output image, one per request; ratio, negative prompt and seed do not change billing. See the live price for the current rate.
Try Imagen 4 now
Write a prompt and pick a ratio in the Playground, then call /v1/tasks with the same inputs.
Related articles
Need to compare models and billing tiers?View live pricing for all models
Frequently asked questions
What is Imagen 4 good for?
Everyday product, lifestyle and content images. Describe the subject, scene, material and light to get an image ready for review, for product heroes, campaign drafts and editorial illustrations.
Which aspect ratios does Imagen 4 support?
Six: 1:1, 16:9, 9:16, 3:4, 4:3 and auto. aspect_ratio is required; the Playground on this page defaults to 16:9.
How long can the prompt be?
Up to 5,000 characters. prompt is required; order it as subject, scene, material, light and text.
Can I exclude things I don't want?
Yes, with negative_prompt. It is optional, up to 5,000 characters, and works for extra text, watermarks or a cluttered background.
What format does seed use?
A string of up to 500 characters, optional. Keep the seed and other inputs fixed to compare only the prompt change.
Can I upload a reference image?
No. Imagen 4 generates from text only; to edit an existing image, see Nano Banana 2.1 in the related models, which edits with references.
How many images per request?
One. Submit several tasks for more versions.
Can I set pixel size or output format?
No. Only aspect_ratio is exposed; custom pixel dimensions and output-format controls are not offered.
Can the image contain text?
Yes, but check it before delivery. Put the exact text in quotes with its position and size and say no other text should appear; the poster example on this page came back with one extra letter in its headline.
Imagen 4, Fast or Ultra?
Choose Imagen 4 for everyday production. Choose Imagen 4 Fast for many drafts and Imagen 4 Ultra when the final needs more detail; each has its own model ID, so one project can use them at different stages.
How do I call the API?
Submit a task to POST /v1/tasks. Send model: "Google-Imagen4" and prompt plus aspect_ratio inside input. The response returns a taskId right away; set callback.url for a completion notice or query GET /v1/tasks/:id, then download the image from output.
How is it billed?
Per image, one per request. Aspect ratio and seed do not change billing; see the live price on this page, and the task record is final.