ChatGPT

ChatGPT is OpenAI's flagship AI assistant and the world's most widely used AI tool, serving hundreds of millions of users across every category of knowledge work. Built on the GPT-5.4 model as of March 2026, it handles text generation, coding, image creation, data analysis, voice conversations, and web browsing in a single interface.

OpenAI offers six tiers: Free (limited GPT-5.4, basic features, ad-supported in the US), Go ($8/month, more capacity), Plus ($20/month, full GPT-5.4 access, DALL·E, Sora, Deep Research, advanced voice mode), Pro ($200/month, unlimited access including o3 Pro and GPT-5.4 Pro), Business ($25–30/user/month, workspace privacy, team features, SAML SSO), and Enterprise (custom pricing, unlimited context, dedicated support). The Plus plan represents the best value for most individual users.

ChatGPT is the default starting point for anyone new to AI. Its breadth is its biggest strength — you can switch between chatting, coding, image generation, file analysis, and voice in a single session. The main weaknesses are usage limits on free and lower tiers, and the fact that conversations may be used for training unless you opt out. For teams handling sensitive data, the Business plan's privacy guarantee is essential.