ChatGPT

Overview

OpenAI's flagship consumer assistant, running the GPT-5 family by default, with advanced voice, cross-chat memory, Projects, image and video generation, and agentic 'Agent Mode'. The largest consumer AI product in the world.

900M+ weekly active users and ~50M paying subscribers as of early 2026; the free tier moved to GPT-5.5 in May 2026.

Key Specs