The best AI assistant in 2026

There is no single best AI assistant; there is the best one for what you want from it. Here is a plain guide to the main choices, with what each does best, so you can pick, or combine two (September 2026).

Two fathers cook with their daughter while a phone stands against the kitchen wall (illustrative photo).

For thinking, writing and code

ChatGPT from OpenAI and Claude from Anthropic are the two strongest general chat assistants. ChatGPT is the all-rounder with images, voice and a huge user base; Claude is loved for careful writing, long documents and programming. Both have a free tier and paid plans from about $20 a month. Google's Gemini is the natural pick if you live in Gmail, Docs and Android.

For quick answers and the web

Perplexity answers with sources and its Comet browser brings an assistant to every page, free for everyone. DeepSeek's app is free and strong at reasoning, but its privacy policy says data is stored in China. Siri is built into every Apple device and good for timers, messages and smart home, and Apple is making it smarter step by step.

For getting things done

Iris is made for the step after the answer: it reads and sorts your mail, plans your week, books, fills in and pays, and asks for your okay with Face ID or Touch ID before anything that counts. It runs on your iPhone, Mac, tv and in Chrome with one memory, and you can talk to it like a person.

For privacy

Check where your conversations are stored and who can read them. Iris gives every account its own sealed-off assistant on servers in Europe, keeps passwords in a vault the assistant never sees, and logs everything it does. It sends only the text it needs to a language model to think.

Be among the first

Have an invite? Log in. Using Iris means you accept the terms of service. The privacy statement explains what we keep.

Questions

Which AI assistant is best for iPhone?

For built-in basics, Siri. For chatting, the ChatGPT or Claude app. For an assistant that acts in your mail and calendar and approves with Face ID, Iris, now in public beta on iPhone.

Is there a free AI assistant?

Yes. ChatGPT, Claude, Gemini, Perplexity and DeepSeek all have free tiers, and so does Iris, with a fair amount of use each week.

Can I use more than one?

Yes, and many people do: a chat assistant for thinking and writing, and Iris for the errands that follow.