Free AI Tools, TestedGet the weekly pick

All tools / AI assistants and models

Microsoft 365 Copilot

An AI assistant built into Word, Excel, PowerPoint, Outlook, and Teams that now lets you choose between OpenAI's GPT models and Anthropic's Claude for different tasks.

Tool of the WeekAI assistants and modelsLast tested 21 Mar 2026

Pricing

Included in Microsoft 365 Business plans ($18-21/user/month) and Enterprise ($30/user/month). Copilot Pro for personal use is $20/month. A new E7 tier with enhanced AI features launches May 1 at $99/user/month.

As reported in our 21 Mar 2026 issue.

Try it in 3 steps

  1. Open any Microsoft 365 app and click the Copilot icon in the toolbar. In Copilot Chat, you can now switch between GPT and Claude models depending on the task.
  2. For deep research, select "Researcher" under Agents in Chat, then choose Claude. Ask it to analyze long documents, compare data across files, or synthesize meeting notes into action items.
  3. For multi-step work, describe what you need in plain English ("Summarize this week's Project X emails and draft a status update for my manager") and Copilot Cowork will execute across Outlook, Word, and Teams.

Visit Microsoft 365 Copilot

Where we covered it

More ai assistants and models tools

Get the one tool worth trying each week.

One free AI tool we actually tried, what it hands you, and whether the free plan is enough. Plus the week's AI news in plain English. About a 4 minute read, every Saturday.

Subscribe free