OpenAI Blog

How Amgen uses GPT-5

Learn how Amgen uses GPT-5.

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

GPT-5 System Card

This GPT-5 system card explains how a unified model routing system powers fast and smart responses using gpt-5-main, gpt-5-thinking, and lightweight versions like gpt-5-thinking-nano, optimized for different tasks and developer use.