ChatGPT, Claude or Gemini: which should you use for work?

ChatGPT, Claude and Gemini are all capable general assistants. For most everyday work tasks, such as drafting, summarising, rewriting and brainstorming, any of them will do a good job. The differences between them change with every release, so a ranking written today will be out of date within months. A better approach is to choose on factors that change slowly.

Factor 1: what your organisation approves

This comes first. If your employer provides one of these tools with a business agreement, use it for work material. An approved tool that is slightly weaker at a task is a better choice than an unapproved one that is slightly stronger, because the approved tool has been cleared for the information you will put into it.

Factor 2: where you already work

Integration matters more than small differences in quality. Gemini is built into Google Workspace, so it suits organisations that live in Gmail, Docs and Drive. Microsoft Copilot, which is built on OpenAI models, is integrated with Outlook, Word, Excel and Teams. ChatGPT and Claude are strong standalone assistants with their own apps and connections to other services. A tool that can read the document you are working on saves more time than a marginally better tool that requires copying and pasting.

Factor 3: the task

• Long documents: all three accept long inputs, but test each on a real document of the length you work with before deciding.
• Writing in a particular voice: try the same prompt, with the same example, in two tools and compare the drafts side by side.
• Current information: use a tool with web search switched on, and open the sources it cites.
• Data and spreadsheets: tools that can run code on an uploaded file handle calculations more reliably than those that only generate text.

A fair test takes twenty minutes

Pick three tasks you really do each week. Write one good prompt for each, with the same context, and run it in two tools. Compare the results for accuracy, how much editing each needed, and how easily the tool fits into your day. This tells you more than any published comparison, because it measures the tools on your work rather than on someone else's benchmark.

Do you need more than one?

Usually not. Most people get more value from learning one tool well than from switching between several. Skill with prompts, context and checking transfers between tools almost completely; it is the part worth investing in.

Module 9 of the free Course Parse course is about choosing the right tool for a task, including when a general assistant is the wrong choice altogether.