Pro, GPT-5 mini, and GPT-5 nano—what the company calls its "best AI system yet," with availability across all ChatGPT tiers, ...

OpenAI has begun rolling out GPT-5, the latest iteration of its flagship language model, to all ChatGPT users.

OpenAI aims to solve its messy naming problem—and usher in an era of what Sam Altman calls 'software on demand.' ...