GPT-Image Series Image Generation

Overview of OpenAI GPT-Image series image generation models, including GPT-Image-1.5 and GPT-Image-1, accessible via APIYI.

The OpenAI GPT-Image series is one of the most advanced AI image generation model families, supporting text-to-image generation, image editing, and more. APIYI fully supports the GPT-Image series with complete compatibility with the OpenAI official Image API format.

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Model Comparison

Feature	GPT-Image-1.5	GPT-Image-1	GPT-Image-1-Mini
Release Date	December 2025	April 2025	April 2025
Generation Speed	Ultra fast (under 10s)	Standard	Faster
Text Rendering	Excellent (dense text, tables)	Good	Good
Editing Capability	High-precision element preservation	Standard	Standard
Instruction Following	More precise	Standard	Standard
Input Price	$5.00 / million tokens	$2.50 / million tokens	Lower
Output Price	$10.00 / million tokens	$8.00 / million tokens	Lower
Best For	Professional design, branding, infographics	General image generation	Rapid prototyping, batch generation

How to Choose?

• Need precise text rendering, brand assets, infographics → GPT-Image-1.5
• General image generation, budget-conscious → GPT-Image-1
• Rapid iteration, batch production → GPT-Image-1-Mini

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Quick Start

All GPT-Image models share the same API format — just change the model parameter to switch:

from openai import OpenAI

client = OpenAI(
    api_key="YOUR_API_KEY",
    base_url="https://api.apiyi.com/v1"
)

{/* Using GPT-Image-1.5 */}
response = client.images.generate(
    model="gpt-image-1.5",
    prompt="A professional product showcase with white background and soft lighting",
    size="1024x1024",
    quality="high"
)

print(response.data[0].url)

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Common Parameters

All GPT-Image models support the following parameters:

Parameter	Type	Description
model	string	gpt-image-1.5, gpt-image-1, or gpt-image-1-mini
prompt	string	Image description (max 1000 characters)
size	string	1024x1024, 1536x1024, 1024x1536, auto
quality	string	low, medium, high, auto
output_format	string	png, jpeg, webp
background	string	transparent, opaque, auto
n	integer	Number of images (1-10)

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Detailed Documentation

GPT-Image-1.5

Latest flagship model, 4x speed boost, superior text rendering, LMArena #1

GPT-Image-1

Classic image generation model, ideal for general use, cost-effective

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FAQ

What's the difference between GPT-Image-1.5 and GPT-Image-1?

GPT-Image-1.5 is 4x faster, ~20% cheaper, with significantly improved text rendering (supporting dense text and tables), and more precise editing that preserves original elements. GPT-Image-1 is best for general image generation at a lower price point.

Can generated images be used commercially?

Yes, images generated via the API are fully yours to use, including for commercial purposes.

Are Chinese prompts supported?

Yes, but English prompts generally produce the best results. For scenes requiring Chinese text rendering, GPT-Image-1.5 has significantly stronger text capabilities.

How do I migrate from GPT-Image-1 to 1.5?

Simply change the model parameter from gpt-image-1 to gpt-image-1.5. All other parameters are fully compatible — no code changes needed.

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