The general-purpose AI assistant most people start with — strong at writing, reasoning and code.

Anthropic's assistant — a favourite for long documents, careful writing and thoughtful reasoning.

Google's AI assistant — strong multimodal skills and tight integration with Google's apps.

xAI's assistant with live access to X — strong on current events and a looser, wittier tone.

An AI answer engine that cites its sources — the fastest way to research a question.