The world's most-used AI assistant — from everyday questions to complex coding, writing, and analysis
ChatGPT is OpenAI's flagship conversational AI, used by over 300 million people weekly. Built on the GPT-4o and o-series models, it handles everything from answering questions and writing code to analyzing images, generating documents, and reasoning through complex problems. The free tier now includes GPT-4o access, making it the most accessible frontier AI tool available. What sets ChatGPT apart is breadth: it browses the web in real time, runs Python code in a sandbox, generates and edits images via DALL-E 3, transcribes voice, and maintains multi-turn conversations with memory across sessions. The Advanced Voice Mode turns it into a natural-language interface you can talk to fluidly. For developers, the API gives programmatic access to all models including o1, o3, and GPT-4o. The GPT Store lets users deploy and share custom agents (GPTs) without code. Team and Enterprise plans add admin controls, longer context windows, and compliance features (SOC 2, HIPAA-eligible). The tradeoffs: heavy users on the free plan hit rate limits fast. The $20/month Plus plan unlocks priority access but the $200/month Pro plan — with unlimited o1 and o3 reasoning — is aimed at professionals who genuinely need those models daily. Response quality can vary by task; specialized coding tools like Cursor or GitHub Copilot often outperform ChatGPT for code-specific workflows.