# Imagen 4.0 Ultra Generate 001

> Google's Imagen 4.0 Ultra model offering the highest fidelity and resolution for professional-grade image generation

## Quick Reference

- Model ID: imagen-4.0-ultra-generate-001
- Creator: Google
- Status: active
- Family: imagen-4
- Base URL: https://api.lumenfall.ai/openai/v1

## Specifications

- Input Modalities: text
- Output Modalities: image
- Supported Modes: Text to Image

## API Parameters

The compiled parameter schema for this model is available via the API: `GET /v1/models/imagen-4.0-ultra-generate-001?schema=true`.

### Core Parameters

- `prompt` (string) — REQUIRED: Text prompt for image generation
- `negative_prompt` (string): Negative prompt to guide generation away from undesired content
- `seed` (integer): Random seed for reproducibility

### Size & Layout

- `size` (string): Image dimensions as WxH pixels (e.g. "1024x1024") or aspect ratio (e.g. "16:9"). Values: 1365x768, 768x1365, 887x1182, 1024x1024, 1183x887, 2048x2048, 2731x1536, 1536x2731, 2365x1774, 1774x2365
- `aspect_ratio` (string): Aspect ratio of the output image (e.g. "16:9", "1:1"). Values: 9:16, 3:4, 1:1, 4:3, 16:9
- `resolution` (string): Output resolution tier (e.g. "1K", "4K"). Values: 1K, 2K

### Output & Format

- `response_format` (string): How to return the image. Default: url. Values: url, b64_json
- `output_format` (string): Output image format. Values: png, jpeg, gif, webp, avif
- `output_compression` (integer): Compression level for lossy formats (JPEG, WebP, AVIF)
- `n` (integer): Number of images to generate. Default: 1

### Additional Parameters

- `image_size` (string): Resolution of the generated image. Values: 1K, 2K. Only available via replicate
- `personGeneration` (string): Whether to allow generation of people. 'allow_adult' permits adults only; 'dont_allow' blocks all human generation.. Values: allow_adult, dont_allow
- `safety_filter_level` (string): block_low_and_above is strictest, block_medium_and_above blocks some prompts, block_only_high is most permissive but some prompts will still be blocked. Values: block_low_and_above, block_medium_and_above, block_only_high. Only available via replicate
- `safety_tolerance` (string): The safety tolerance level for content moderation. 1 is the most strict (blocks most content), 6 is the least strict.. Values: 1, 2, 3, 4, 5, 6. Only available via fal
- `sync_mode` (boolean): If `True`, the media will be returned as a data URI and the output data won't be available in the request history.. Only available via fal


## Model Identifiers

- Primary Slug: imagen-4.0-ultra-generate-001

## Dates

- Released: August 2025

## Tags

image-generation, text-to-image, ultra, high-quality

## Available Providers

### fal.ai

- Config Key: fal/imagen-4.0-ultra-generate-001
- Provider Model ID: fal-ai/imagen4/preview/ultra
- Pricing: $0.060/image
  - Source: https://fal.ai/models/fal-ai/imagen4/preview/ultra/api

### Vertex AI

- Config Key: vertex/imagen-4.0-ultra-generate-001
- Provider Model ID: imagen-4.0-ultra-generate-001
- Regions: global
- Pricing: $0.060/image
  - Source: https://cloud.google.com/vertex-ai/generative-ai/pricing

### Replicate

- Config Key: replicate/imagen-4.0-ultra-generate-001
- Provider Model ID: google/imagen-4-ultra
- Pricing: $0.060/image
  - Source: https://replicate.com/google/imagen-4-ultra

### Gemini API

- Config Key: gemini/imagen-4.0-ultra-generate-001
- Provider Model ID: imagen-4.0-ultra-generate-001
- Regions: global
- Pricing: $0.060/image
  - Source: https://ai.google.dev/gemini-api/docs/pricing#imagen


## Performance Metrics

Provider performance over the last 30 days.

### gemini

- Median Generation Time (p50): 16148ms
- 95th Percentile Generation Time (p95): 21046ms
- Average Generation Time: 15768ms
- Success Rate: 100.0%
- Total Requests: 10
- Time to First Byte (p50): 15264ms
- Time to First Byte (p95): 21004ms

### vertex

- Median Generation Time (p50): 27117ms
- 95th Percentile Generation Time (p95): 29381ms
- Average Generation Time: 25066ms
- Success Rate: 100.0%
- Total Requests: 11
- Time to First Byte (p50): 25755ms
- Time to First Byte (p95): 29032ms


## Arena Benchmarks

### Heroic Super Hero Portrait

- Elo: 1199
- Record: 5W / 7L / 4T (16 battles)
- Rank: #9 of 21

### Geometric Composition

- Elo: 1184
- Record: 9W / 19L / 3T (31 battles)
- Rank: #20 of 70

### Vintage Cafe Logo

- Elo: 1168
- Record: 10W / 14L / 4T (28 battles)
- Rank: #18 of 70

### Victorian Greenhouse Oasis

- Elo: 1168
- Record: 11W / 10L / 1T (22 battles)
- Rank: #14 of 17

### Apollo 11: Journey to Tranquility

- Elo: 1165
- Record: 8W / 20L / 4T (32 battles)
- Rank: #17 of 70

### Isometric Miniature Diorama Scenes

- Elo: 1159
- Record: 10W / 11L / 2T (23 battles)
- Rank: #20 of 72

### Candid Street Photography

- Elo: 1153
- Record: 3W / 17L / 1T (21 battles)
- Rank: #26 of 68

### Modern Clean Menu

- Elo: 1130
- Record: 4W / 13L / 1T (18 battles)
- Rank: #24 of 69

### Intricate Floral Mandala

- Elo: 1114
- Record: 5W / 14L / 0T (19 battles)
- Rank: #15 of 15

### Adorable Baby Animals in Sunny Meadow

- Elo: 1082
- Record: 7W / 12L / 3T (22 battles)
- Rank: #38 of 72


## Use Cases & Category Performance

### 3D Imaging & Modeling (Text-to-Image)

- Rank: #20 of 45
- Elo: 1199
- Record: 19W / 30L / 5T (54 battles)
- Win Rate: 35.2%

### Text Rendering (Text-to-Image)

- Rank: #30 of 61
- Elo: 1200
- Record: 32W / 61L / 11T (104 battles)
- Win Rate: 30.8%

### Aesthetics (Text-to-Image)

- Rank: #30 of 62
- Elo: 1216
- Record: 44W / 88L / 14T (146 battles)
- Win Rate: 30.1%

### Creativity (Text-to-Image)

- Rank: #31 of 62
- Elo: 1206
- Record: 28W / 47L / 10T (85 battles)
- Win Rate: 32.9%

### Product, Branding & Commercial (Text-to-Image)

- Rank: #32 of 61
- Elo: 1197
- Record: 22W / 50L / 9T (81 battles)
- Win Rate: 27.2%

### Prompt Adherence (Text-to-Image)

- Rank: #36 of 61
- Elo: 1207
- Record: 39W / 76L / 13T (128 battles)
- Win Rate: 30.5%

### Photorealism (Text-to-Image)

- Rank: #39 of 62
- Elo: 1165
- Record: 20W / 49L / 7T (76 battles)
- Win Rate: 26.3%


## Image Gallery

14 images available for this model. Browse all at https://lumenfall.ai/models/google/imagen-4.0-ultra-generate-001/gallery

### Curated Examples

- [Cinematic wide shot of a high-end, minimalist luxury boutique storefront at dusk. The shop's faca...](https://assets.lumenfall.ai/_EPugODfEVf-KqeE9KLXqEN2-K64AfpCzf7113kj0mk/rs:fit:1500:1500/plain/gs://lumenfall-prod-assets/bzcw3dydki0ngdfpv5ocbx7lj1sd@jpeg)
- [A hyper-realistic close-up portrait of an elderly watchmaker in a sun-drenched workshop, intricat...](https://assets.lumenfall.ai/WQHuPV9_j4VCjtTXDOWcusmLy27sxeuJ17IZkuN6-gE/rs:fit:1500:1500/plain/gs://lumenfall-prod-assets/h6ylyzro8xw009y38jry3irmwxp7@jpeg)
- [A hyper-realistic close-up of a weathered, vintage leather traveler's journal resting on a rustic...](https://assets.lumenfall.ai/3YC3vwLUW8FoECCE1MdAtd-bg1TPcoj_NI-oHxzuYX8/rs:fit:1500:1500/plain/gs://lumenfall-prod-assets/blzwxscpg54nn0no69m1qg9aqq84@jpeg)
- [A vibrant, sun-drenched farmers market stall with a chalkboard sign that reads "FRESH ORGANIC HAR...](https://assets.lumenfall.ai/inosC_s91mr1Sb8sMryQMRwnZ3cHvtQuF0zs7HzGBsY/rs:fit:1500:1500/plain/gs://lumenfall-prod-assets/5mie1gv8x9p9vo06f59ihn8kr7kx@jpeg)

### Arena Competition Results

- [Heroic Super Hero Portrait](https://assets.lumenfall.ai/QA4bAZViUyI7o26HX3l26RubMBUAF6okSoBTYeLCiGI/rs:fit:1500:1500/plain/gs://lumenfall-prod-assets/nnt6qrsqdj0xue7wew8vqtopomp2@jpeg): #9 of 21 (Elo 1199)
- [Geometric Composition](https://assets.lumenfall.ai/kY0857VmfTE0C7piaeEjjb0CDy9jqB_h5qGgECSbxKE/rs:fit:1500:1500/plain/gs://lumenfall-prod-assets/7qhee4nyg3hxv0qcogwqqmed19xi@jpeg): #20 of 70 (Elo 1184)
- [Vintage Cafe Logo](https://assets.lumenfall.ai/riXzg-8j9SdGxzRQD9hVT6nmuEvUzrQQhf97trL3TT0/rs:fit:1500:1500/plain/gs://lumenfall-prod-assets/teb2bizf1hgupegoug7la0tf61vc@jpeg): #18 of 70 (Elo 1168)
- [Victorian Greenhouse Oasis](https://assets.lumenfall.ai/FrlXVFA3ra5Am2vEi2US3d1nkB1k49hs21kvDDvlF4w/rs:fit:1500:1500/plain/gs://lumenfall-prod-assets/c0cj894bqgogp8b5zhptbs3rje9i@jpeg): #14 of 17 (Elo 1168)
- [Apollo 11: Journey to Tranquility](https://assets.lumenfall.ai/qzvq_m_oPZe3JMkUKpVho8bBUfxhcfTE1t1muAS0LEk/rs:fit:1500:1500/plain/gs://lumenfall-prod-assets/8hcr8lkqwd92ouotzrnuuuibd10z@jpeg): #17 of 70 (Elo 1165)
- [Isometric Miniature Diorama Scenes](https://assets.lumenfall.ai/gUqzcLKYzrNgxg9HDoJ0b6FtCnyiwEDmOududXyTUmU/rs:fit:1500:1500/plain/gs://lumenfall-prod-assets/l4ma731zt0w3fvnljmo30tfhwb1k@jpeg): #20 of 72 (Elo 1159)
- [Candid Street Photography](https://assets.lumenfall.ai/FyJj0LIaibUyjyV_mKegPuMfrmfITLmTlHWLN9uhkY8/rs:fit:1500:1500/plain/gs://lumenfall-prod-assets/wknbpxrpyvrpj8khpa8trc30u06i@jpeg): #26 of 68 (Elo 1153)
- [Modern Clean Menu](https://assets.lumenfall.ai/Y6WPUoK3TkgzvGF30fgO6fF4FEFXZkr4FovLiow2lLU/rs:fit:1500:1500/plain/gs://lumenfall-prod-assets/pk7d0cxyevc4fweb05kbt1klqf0u@jpeg): #24 of 69 (Elo 1130)
- [Intricate Floral Mandala](https://assets.lumenfall.ai/KK-uuChb_-BCc4bDRQcEUcsuHp57_19Rwf_wFBqWzkk/rs:fit:1500:1500/plain/gs://lumenfall-prod-assets/5v1st1xl09fudxzlh0ehbbkrkdp8@jpeg): #15 of 15 (Elo 1114)
- [Adorable Baby Animals in Sunny Meadow](https://assets.lumenfall.ai/XZ-LRg07XTc-Ab8t-Lro9A0pap3GzkFh1EabkgK6XY0/rs:fit:1500:1500/plain/gs://lumenfall-prod-assets/8xjone82e24mf2hptxp48fbqfs2v@jpeg): #38 of 72 (Elo 1082)

## Example Prompt

The following prompt was used to generate an example image in our playground:

A vibrant, sun-drenched farmers market stall with a chalkboard sign that reads "FRESH ORGANIC HARVEST" in elegant, hand-lettered chalk typography. In the soft-focus background, a capybara calmly inspects a crate of apples near a wooden cart.

## Code Examples

### Text to Image (/v1/images/generations)

#### cURL

curl -X POST \
  https://api.lumenfall.ai/openai/v1/images/generations \
  -H "Authorization: Bearer $LUMENFALL_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "imagen-4.0-ultra-generate-001",
    "prompt": "",
    "size": "1024x1024"
  }'

# Response:
# { "created": 1234567890, "data": [{ "url": "https://...", "revised_prompt": "..." }] }

#### JavaScript

import OpenAI from 'openai';

const client = new OpenAI({
  apiKey: 'YOUR_API_KEY',
  baseURL: 'https://api.lumenfall.ai/openai/v1'
});

const response = await client.images.generate({
  model: 'imagen-4.0-ultra-generate-001',
  prompt: '',
  size: '1024x1024'
});

// { created: 1234567890, data: [{ url: "https://...", revised_prompt: "..." }] }
console.log(response.data[0].url);

#### Python

from openai import OpenAI

client = OpenAI(
    api_key="YOUR_API_KEY",
    base_url="https://api.lumenfall.ai/openai/v1"
)

response = client.images.generate(
    model="imagen-4.0-ultra-generate-001",
    prompt="",
    size="1024x1024"
)

# { created: 1234567890, data: [{ url: "https://...", revised_prompt: "..." }] }
print(response.data[0].url)


## About

## Overview
Imagen 4.0 Ultra Generate 001 is Google’s high-fidelity flagship text-to-image model, engineered for professional-grade creative workflows. It serves as the top-tier offering in the Imagen 4 family, prioritizing photochemical realism, intricate detail, and high-resolution output over processing speed. The model is designed to translate complex natural language prompts into visually coherent assets with a focus on aesthetic quality and structural accuracy.

## Strengths
*   **Photorealistic Texture and Lighting:** Excels at rendering complex surfaces such as skin pores, fabric weaves, and atmospheric lighting, making it suitable for high-end commercial photography simulations.
*   **Prompt Adherence:** Demonstrates a high degree of spatial reasoning and semantic understanding, accurately placing multiple objects in a scene based on descriptive prepositions.
*   **Typography and Text Rendering:** Specifically optimized to minimize the character distortions common in earlier generative models, allowing for legible and stylistically consistent text overlays within images.
*   **High-Resolution Composition:** Capable of generating high-density visual information that maintains clarity even when scaled for professional print or large-format digital displays.

## Limitations
*   **Inference Latency:** Due to its "Ultra" architecture and high parameter count, generation times are typically longer compared to "Flash" or "Pro" variants optimized for near-instantaneous previews.
*   **Strict Safety Filtering:** Google’s integrated safety guardrails can be more restrictive than open-weights models, sometimes rejecting prompts that contain stylized violence or sensitive public figures.
*   **Compute Cost:** At a starting price of $0.06 per generation, it carries a higher operational cost, making it less ideal for high-volume batch processing where lower fidelity would suffice.

## Technical Background
Imagen 4.0 Ultra utilizes a transformer-based diffusion architecture, transitioning from earlier U-Net designs to leverage the scaling laws seen in large language models. The training process incorporates a massive dataset of high-resolution images paired with descriptive, high-quality captions to bridge the gap between human intent and visual execution. A key technical focus for this version is the refined latent space, which allows the model to handle higher pixel density without introducing artifacts.

## Best For
This model is best suited for visual content creation where quality is non-negotiable, such as digital marketing campaigns, concept art for film and gaming, and professional architectural visualizations. It is particularly effective for designers who need to produce "hero" assets that require minimal manual retouching. 

Imagen 4.0 Ultra Generate 001 is available for integration and testing through Lumenfall's unified API and playground, providing a streamlined environment to compare its output alongside other industry-leading generative models.

## Frequently Asked Questions

### How much does Imagen 4.0 Ultra Generate 001 cost?

Imagen 4.0 Ultra Generate 001 starts at $0.06 per image through Lumenfall. Pricing varies by provider. Lumenfall does not add any markup to provider pricing.

### How do I use Imagen 4.0 Ultra Generate 001 via API?

You can use Imagen 4.0 Ultra Generate 001 through Lumenfall's OpenAI-compatible API. Send requests to the unified endpoint with model ID "imagen-4.0-ultra-generate-001". Code examples are available in Python, JavaScript, and cURL.

### Which providers offer Imagen 4.0 Ultra Generate 001?

Imagen 4.0 Ultra Generate 001 is available through fal.ai, Vertex AI, Replicate, and Gemini API on Lumenfall. Lumenfall automatically routes requests to the best available provider.

## Links

- Model Page: https://lumenfall.ai/models/google/imagen-4.0-ultra-generate-001
- About: https://lumenfall.ai/models/google/imagen-4.0-ultra-generate-001/about
- Providers, Pricing & Performance: https://lumenfall.ai/models/google/imagen-4.0-ultra-generate-001/providers
- API Reference: https://lumenfall.ai/models/google/imagen-4.0-ultra-generate-001/api
- Benchmarks: https://lumenfall.ai/models/google/imagen-4.0-ultra-generate-001/benchmarks
- Use Cases: https://lumenfall.ai/models/google/imagen-4.0-ultra-generate-001/use-cases
- Gallery: https://lumenfall.ai/models/google/imagen-4.0-ultra-generate-001/gallery
- Playground: https://lumenfall.ai/models/google/imagen-4.0-ultra-generate-001/playground
- API Documentation: https://docs.lumenfall.ai