OpenAI Blog

Building with the GPT-5 Model Series: A Practical Guide

OpenAI Blog
Apr 10

Using custom GPTs

Learn how to build and use custom GPTs to automate workflows, maintain consistent outputs, and create purpose-built AI assistants.

OpenAI Blog
Oct 2

A model guide for the GPT-6 family

The article explains how startups can select GPT‑6 models and adjust their reasoning effort. It offers guidance on improving prompts and skills, coordinating tools, and preparing production workflows.

OpenAI Blog
Apr 23

Introducing GPT-5.5

Introducing GPT-5. 5, our smartest model yet—faster, more capable, and built for complex tasks like coding, research, and data analysis across tools.

OpenAI Blog
Aug 7, 2025

Introducing GPT-5

We are introducing GPT‑5, our best AI system yet. GPT‑5 is a significant leap in intelligence over all our previous models, featuring state-of-the-art performance across coding, math, writing, health, visual perception, and more.

OpenAI Blog
Apr 14, 2025

Introducing GPT-4.1 in the API

Introducing GPT-4. 1 in the API—a new family of models with across-the-board improvements, including major gains in coding, instruction following, and long-context understanding.