HiAPI
21:9 宽幅 Hero 图:左侧柔和留白光晕,右侧半透明玻璃浮卡与光带层叠,棱镜虹彩多色渐变,发光蚀刻字样 imagen-4,用于 imagen-4.0 详情页。

Google

Imagen 4

imagen-4.0-ultra

Google's text-to-image series, focused on in-image text rendering and complex lighting, offering Fast, Standard, and Ultra tiers that trade off quality against cost

Try imagen-4.0-ultra

Input

Output

image
Fill in the parameters and run — results show up here.

Pricing

imagen-4.0-ultra per image

Unit Price $0.090

Overview

imagen-4.0-ultra is the text-to-image model in the Imagen 4 family aimed at high-fidelity output, suited to generation tasks that demand precise prompt adherence, complex scene composition, and legible in-image text. Developers generate images from text prompts through the unified HiAPI.ai interface, with a choice of 1:1, 16:9, 9:16, 3:4, 4:3, or auto aspect ratios, making it the pick for the final-output stage of brand visuals, design drafts, and concept art.

Key Highlights

  • Sharper prompt adherence and detail — as the Ultra version, it aligns more strongly with text prompts and produces output closer to the instructions, making it suitable for production-grade image generation.
  • Improved in-image text rendering — a marked improvement over previous generations in generating text inside images, making posters and signage-type content more usable.
  • Direct output by aspect ratio — the required aspect_ratio supports 1:1, 16:9, 9:16, 3:4, 4:3, and auto, so images fit ad placements without a second crop.

Capabilities

High-fidelity text-to-image: generates photorealistic images from text prompts, suitable for professional brand and design-grade output; prompts have a length limit, so the full intent must be expressed within a limited word count.

Complex composition and lighting: supports generation needs involving complex scene composition and complex lighting, reducing multiple retries and making each call count toward a usable image.

Aspect ratio control: specify the output ratio via the required aspect_ratio, covering square, landscape, portrait, and 3:4 and 4:3 placements to match material specs across channels.

Negative prompt constraints: the optional negative_prompt describes elements to avoid, used to tighten image content and reduce the likelihood of unwanted elements appearing.

Reproducible generation: the optional seed parameter enables reproducible generation, making it easy to fix results during debugging and batch production and to compare the effects of different prompts.

Use Cases

  • Brand and marketing teams: product selling-point copy — input brand tone and selling-point descriptions to generate high-fidelity visual assets ready for ad placements and social channels.
  • Design teams: text needs for posters and presentations — input layout descriptions containing headline text to produce drafts with clearer in-image text, used for design reference and iteration on posters and presentation materials.
  • Concept design: complex composition and lighting descriptions — input scene, camera, and lighting requirements to generate high-fidelity concept images for early-stage visual direction and proposal presentations.
  • Development teams: batch image pipelines — call in batches with fixed seeds and ratio parameters to produce finished images with a consistent style, integrating into content production or asset management workflows.

Limitations and Selection Advice

Accepts text input only and does not support image-input editing; prompt length is constrained by the schema limit, so overly long descriptions must be condensed. Although in-image text has improved, it still needs human review before publishing. The Ultra version costs more per image than other versions in the family, so for large batches of drafts it is advisable to screen first with the standard or Fast version and then output finished images with this model; when image editing or image-to-image capabilities are needed, choose another model.

  • Feature change Imagen 4 model IDs are now imagen-4.0…
  • New model Added Google Imagen 4 image-generation docs

Frequently asked questions

View all FAQs →
  • 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.

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