Last updated: 2 November 2026
There is no single best AI tool for work. Choose by where your team already works: Microsoft Copilot suits teams on Microsoft 365, Google Gemini suits teams on Google Workspace, and ChatGPT and Claude work well as standalone assistants for drafting, analysis and thinking through problems. Test each on one real task before you decide.
These are the four tools we teach in our AI-Powered Productivity course. Features and plans change often, so check each vendor’s current terms before you commit your team.
How do ChatGPT, Claude, Copilot and Gemini compare?
| Tool | Made by | Where it fits best | Good first tasks | Check before using |
|---|---|---|---|---|
| ChatGPT | OpenAI | A standalone assistant for drafting, analysis and brainstorming | Drafting emails and reports, summarising documents | Your plan, and how your data is handled |
| Claude | Anthropic | A standalone assistant, often used for long documents and detailed writing | Reviewing and editing long documents, structured analysis | Your plan, and how your data is handled |
| Microsoft Copilot | Microsoft | Teams that work in Word, Excel, Outlook and Teams | Summarising meetings and email threads, drafting inside documents | Your licence and your administrator’s settings |
| Google Gemini | Teams that work in Gmail, Docs and Sheets | Drafting in Gmail and Docs, summarising threads | Your plan and your workspace settings |
Which tool should you start with for each job?
| Job | Start with | Why |
|---|---|---|
| Drafting and editing email | The assistant built into your email, such as Gemini in Gmail or Copilot in Outlook | It works where you already write |
| Summarising a long report | ChatGPT or Claude | You can paste in or upload the document and ask follow-up questions |
| Working in spreadsheets | Copilot in Excel or Gemini in Sheets | It sits next to the data |
| Brainstorming and structuring a plan | Any of the four | The result depends more on your prompt than on the tool |
| Building a first agent | Any of the four | Use the one your team can already access |
For a hands-on example, see our test of whether Claude can build a customer journey map, where the quality of the answer depended on the facts we supplied.
How do you test them fairly?
- Pick one real task from your week, such as summarising a report or drafting a client reply.
- Give each tool the same prompt and the same material.
- Score each result on accuracy, tone, how much editing it needs and how long it took.
- Check what each tool does with your data, and who in your company can see it.
- Choose the tool your team will actually use, and review the choice after a month.
A well-structured prompt matters more than the brand. Our guide to ChatGPT prompts for busy professionals works with any of the four.
What should you check on cost and privacy?
- Plans. Free and paid plans differ in limits and features, and they change.
- Data handling. Find out whether your inputs are stored or used to improve the model, and who can see them.
- Company policy. Follow your organisation’s rules on which tools and data are allowed.
- Personal data. Customer and staff details need extra care. Our PDPA checklist for using AI on customer data is practical guidance and is not legal advice.
Frequently asked questions
Which is better for work, ChatGPT or Claude?
Neither wins on every task. Both are strong general assistants, and the better one for you depends on your task, your prompt and your plan. Run the same real task through both and compare the results.
Is Microsoft Copilot better than ChatGPT for Microsoft 365 teams?
Copilot has an advantage when the work happens inside Word, Excel, Outlook and Teams, because it works alongside those apps. ChatGPT can still be useful for drafting and analysis outside them. Test both on your actual tasks.
Should my team use more than one AI tool?
It can help, but start with one so people learn it well. Add a second only when a clear job needs it, and keep a short list of approved tools.
Can I use the free version of these tools for work?
Free versions often have limits and may handle data differently from paid or business plans. Read each tool’s terms and your company’s policy before you put work data into it.
Which AI tool should I learn first for work?
Learn the one your team already has access to. The skills of writing a clear prompt, checking the output and deciding what to automate carry over from one tool to another.
Where does this guide fit in our AI productivity series?
This guide supports our complete guide to improving productivity at work with AI. For a wider list of tools by job, see AI tools for workplace productivity in Singapore.
Learn all four tools in one day
In QD Academy’s one-day AI-Powered Productivity: Strategies for the Modern Workplace course, you test ChatGPT, Claude, Google Gemini and Microsoft Copilot side by side and compare their strengths, costs and best uses. You leave with a go-to toolkit that maps each platform to suitable tasks, and with a working AI agent built on a real process from your job. Check the course page for the latest dates, fees and funding.