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how to use gpt4o image generation

4o Image Team•June 16, 2025•2 min

How to Use GPT-4o Image Generation: A Complete Beginner’s Guide

Summary:
Curious about GPT-4o’s new image generation feature? This guide walks you through how to use GPT-4o to generate stunning AI images, from text prompts to customization, even if you're just starting out.

AI-generated images are revolutionizing how creators, developers, and designers approach content creation. With the release of GPT-4o (Omni) by OpenAI, generating high-quality images has never been easier—even for non-technical users.

In this blog, we’ll show you how to use GPT-4o image generation step-by-step, with tips to get the best results from your prompts.

What Is GPT-4o Image Generation?

GPT-4o is OpenAI’s latest multimodal model, capable of processing and generating:

  • Text
  • Images
  • Audio (in select environments)
  • Code

The image generation feature allows users to input text prompts and receive high-quality, photorealistic or stylized images within seconds—making it a competitor to tools like DALL·E, Midjourney, or SDXL.

Step-by-Step: How to Use GPT-4o Image Generation

1. Use It via ChatGPT (Web)

If you’re a ChatGPT Plus user:

  • Go to chat.openai.com
  • Select GPT-4o at the top
  • Type a prompt like:

    “A futuristic city at sunset, in Studio Ghibli style”

GPT-4o will reply with directly generated images, no need to switch tools.

2. Use It via API (For Developers)

If you're building a custom app:

  • Use the OpenAI API
  • Endpoint: v1/images/generations
  • Model: dall-e-3 (currently used by GPT-4o for image gen)

Sample code (Python):

import openai

openai.api_key = "your-api-key"

response = openai.Image.create(
    prompt="a cat playing violin in a forest, anime style",
    n=1,
    size="1024x1024"
)

print(response['data'][0]['url'])