google/imagen-4.0-fast-generate-001

"## What Imagen 4.0 Fast Does
Imagen 4.0 Fast is Google’s text-to-image model optimized for speed. It generates images from text prompts quickly, making it the right choice when you need fast turnaround and high throughput over maximum fidelity.

Key Features

• Speed-Optimized Generation: Tuned for fast image creation and high-volume workflows.
• Batch Output: Generate 1–4 images per request via sampleCount.
• Common Aspect Ratios: Supports 1:1, 3:4, 4:3, 9:16, and 16:9.
• Person Generation Control: Use personGeneration (dont_allow, allow_adult, allow_all) to govern depiction of people.
• Asynchronous Architecture: Uses a ““Create Task → Poll Result”” API workflow built for throughput.

How to Use Imagen 4.0 Fast

1. Write a clear text prompt describing the image you want.
2. Submit a POST request to the /google/imagen-4.0-fast-generate-001 endpoint with your prompt and optional sampleCount, aspectRatio, and personGeneration.
3. Receive an async task response with a task_id and ““pending”” status.
4. Poll the provided GET endpoint to monitor the task.
5. Once complete, retrieve and download the generated image(s).

Best Use Cases

• High-Volume Generation: Produce many images quickly for content pipelines and testing.
• Rapid Iteration: Explore visual directions fast before committing to a final render.
• Social & Marketing Content: Generate on-trend graphics across standard aspect ratios.
• Prototyping: Validate concepts at speed where fidelity is secondary.

Tips for Better Results

• Step Up for Max Quality: For top-tier photorealism, use Imagen 4.0 (standard) or Imagen 4.0 Ultra — Fast trades some fidelity for speed.
• Batch with sampleCount: Generate up to 4 variations per request to compare options efficiently.
• Mind the Rate Limit: Stay within ~100 requests per minute when batching at scale.
• Set Person Policy Deliberately: Use personGeneration to match your safety and content requirements.
• Pick the Right Aspect Ratio: Choose the ratio that fits your placement (e.g., 9:16 vertical, 16:9 widescreen)."

Parameters

Pricing

Unit: $/img

Related Models

• google/imagen-4.0-generate-001: [Core Function] Imagen 4.0 is Google’s flagship professional-grade text-to-image model designed for high-fidelity visual generation. [Strengths] It excels at industry-leading photorealism, exceptional typography/text rendering inside images, and strong prompt adherence, supporting up to 2K resolution and batch generation. [Best For] Highly recommended for general high-quality image generation, marketing assets (posters, product labels, menus, signage), and product photography mockups where readable text is required. [Limitations] Do NOT use this model if you need instant/real-time generation, native image editing (inpainting/outpainting), or negative prompts. It is strictly an image-only output model. [Routing] Use this model by default for high-quality, photorealistic text-to-image requests. If the user emphasizes speed or needs lower cost, route to Imagen 4.0 Fast. If the user demands the absolute highest detail and prompt precision, route to Imagen 4.0 Ultra.
• google/imagen-4.0-ultra-generate-001: [Core Function] Imagen 4.0 Ultra is Google’s premium text-to-image model optimized for the highest quality and instruction alignment. [Strengths] It delivers ultimate photorealistic detail, superior texture rendering, and extremely strict adherence to complex, multi-part prompt instructions, supporting up to 2K resolution. [Best For] Highly recommended for high-end commercial marketing assets, professional design, intricate artistic compositions, and scenarios where precise instruction-following is paramount. [Limitations] Do NOT use this model if you need instant/real-time generation, native image editing (inpainting/outpainting), or negative prompts. It is the most expensive tier in the Imagen family. [Routing] Choose this model when the user demands the absolute highest quality, ultimate detail, or has highly complex prompt instructions. Otherwise, default to standard Imagen 4.0 or Imagen 4.0 Fast.