OpenAI
ChatGPT
ChatGPT is OpenAI's AI assistant, released in November 2022, that answers questions, writes and analyses text, code, images and files, searches the web and carries out multi-step tasks on the web, iOS, Android, macOS and Windows.
Topic hub
AI assistants
An AI assistant is software that understands natural-language requests — typed or spoken — and responds by answering questions, creating content or taking actions on your behalf. Modern AI assistants such as ChatGPT, Claude and Gemini run on large language models, which lets them hold a conversation, work with documents, images and code, search the web and, increasingly, complete multi-step tasks as agents.
This hub covers the general-purpose assistants people use for work, study and everyday questions: what each one does well, what it costs, how they compare and what changes with every new model. Choosing one usually comes down to where you work and which apps you already rely on — our guide to choosing an AI assistant walks through it. For assistants built for speakers, phones and cars, see voice assistants.
Directory
Popular AI assistants
Anthropic
Claude
Claude is Anthropic's AI assistant, first released in March 2023, used for writing, analysis, research and coding in its web, desktop and mobile apps and through Anthropic's API.
Gemini
Gemini is Google's AI assistant, available as the Gemini app on the web, Android and iOS and built into Android, Chrome, Google Workspace and Google Home devices, powered by Google's Gemini family of models.
Microsoft
Microsoft Copilot
Microsoft Copilot is Microsoft's AI assistant, launched as Bing Chat in February 2023 and renamed Copilot in November 2023, that answers questions, writes and creates images in its own app and works inside Windows, Edge, Word, Excel, PowerPoint and Outlook.
Perplexity AI
Perplexity
Perplexity is an AI answer engine from Perplexity AI, launched in December 2022, that searches the web and answers questions in plain language with numbered citations to its sources, and can also run deep research and agent tasks.
SpaceXAI
Grok
Grok is the AI assistant from SpaceXAI, the company formerly called xAI, first released in November 2023, that answers questions using real-time web and X search, generates images and video, and holds voice conversations on the web, iOS, Android and X.
Latest
Latest AI assistant news
AI Assistants
Claude Haiku 5.5: Anthropic's cheapest, fastest small model, its price, benchmarks and what else changed
Claude Haiku 5.5 costs $0.10 and $0.50 per million tokens for prompts up to 100K, about 75% less than Haiku 4.5. See benchmarks and the Sonnet 5.5 price cut.
AI Assistants
Gemini 4 Argon: what Google launched, what it costs and who can use it in the Gemini app
Google's Gemini 4 Argon is live in the Gemini app for AI Pro and Ultra, AI Studio and Antigravity, at $2 and $10 per million tokens. See what it does and who gets it.
AI Assistants
The X Subscription explained: Grok, Cursor and X Premium in one plan, from $8 to $200 a month
SpaceXAI's X Subscription bundles Grok, Grok Bot, Cursor and X Premium into five plans from free to $200 a month. See prices, usage and what changes for existing users.
AI Assistants
What are ChatGPT dots? OpenAI's always-on agents, who gets them and how they stay safe
ChatGPT dots are OpenAI's always-on agents with their own cloud computer. See who gets them, what they cost, what they can do and the controls that keep them in check.
Learn & compare
Guides and comparisons
- ChatGPT vs Claude
- Claude vs Gemini
- Grok vs ChatGPT
- Copilot vs ChatGPT
- Perplexity vs ChatGPT
- Gemini vs ChatGPT
Frequently asked questions
What is an AI assistant?
An AI assistant is software that understands requests written or spoken in everyday language and responds by answering questions, creating content or taking actions. Modern AI assistants such as ChatGPT, Claude and Gemini run on large language models.
What is the difference between an AI assistant and a chatbot?
A chatbot is any program that holds a text conversation. AI assistants are chatbots with tools: they can search the web, read files, remember preferences and take actions, and they increasingly work across text, voice, images and video.
What are the leading AI assistants?
The leading general-purpose AI assistants include ChatGPT from OpenAI, Gemini from Google and Claude from Anthropic, along with Microsoft Copilot, Meta AI, Perplexity and Grok from xAI.
Are AI assistants free?
Most have free tiers with usage limits. Paid plans such as ChatGPT Plus and Claude Pro cost $20 a month in the US and add higher limits, newer models and extra features.