ChatGPT

ChatGPT is the world's most widely used AI assistant, created by OpenAI and launched in November 2022. Built on the GPT-4o model family, it handles natural language conversations, text generation, code writing, image creation, and real-time voice interaction — all from a single interface used by over 200 million people worldwide.

The free tier provides access to GPT-4o mini with generous daily limits, while ChatGPT Plus ($20/month) unlocks the full GPT-4o model, advanced reasoning via o3 and o4-mini, image generation through DALL·E 3, and priority access during peak hours. The Team and Enterprise plans add admin controls, extended context, and data privacy guarantees for businesses.

One of ChatGPT's biggest differentiators is the GPT Store — a marketplace of over one million custom AI agents built by the community and OpenAI partners. From a personalized fitness coach to a legal document analyzer, there is a purpose-built GPT for almost any task. Deep integrations with Zapier, Notion, Microsoft 365, and hundreds of other tools via the Actions API make it the most connected AI platform available today.