Quick Answer
There's no single best AI for business. Claude is strongest for decks, long documents and working inside your files. ChatGPT is strongest for images and tasks that run on their own. Gemini is the natural choice inside Gmail and Google Docs. Copilot is the natural choice inside Word, Outlook and Teams. Most teams get the best results using two or more, with the same instructions behind each.
The Best AI for Each Job
| Job | Best fit | Why |
|---|---|---|
| Presentations and one-pagers | Claude | Claude Design builds decks to your brand and exports to PowerPoint, PDF or Canva |
| Images and illustrations | ChatGPT | ChatGPT Images creates and edits images in the chat |
| Email and documents in Microsoft 365 | Copilot | Built into Outlook, Word and Excel, and reads your organisation's files |
| Email and documents in Google Workspace | Gemini | Built into Gmail, Docs and Sheets, and included in Workspace plans |
| Long reports, contracts and policies | Claude | Handles long documents and careful writing well |
| Tasks that run on a schedule | ChatGPT | Scheduled tasks and agent mode |
| Multi-step work in your folders | Claude | Claude Cowork turns a folder and a goal into a finished file |
| Research with sources | Any of the four | All four now offer a deep research mode |
Each One in a Paragraph
ChatGPT is the all-rounder most people already know. Its business plan includes images, agent mode, scheduled tasks and a large plugin directory, from USD 20 per user per month billed annually (ChatGPT pricing). Custom GPTs are being retired in favour of plugins (OpenAI).
Claude is built for working through documents and files. Team plans include Claude Design, Claude Cowork, Claude Code and Microsoft 365 integration, from USD 20 a seat a month billed annually (Claude pricing).
Gemini is Google's AI, built into Gmail, Docs, Sheets and Meet and included in Google Workspace business plans, with Gems for saved instructions and NotebookLM for working with your sources (Google Workspace pricing).
Copilot is Microsoft's AI. Copilot Chat comes with Microsoft 365, and the paid Microsoft 365 Copilot add-on works inside Word, Excel, PowerPoint, Outlook and Teams using your organisation's data (Microsoft 365 Copilot Business).
Head to Head
Claude vs Gemini. Choose Gemini for work inside Google Workspace, where it already sits in Gmail and Docs. Choose Claude for decks in Claude Design, long documents and multi-step work in your folders with Cowork. Teams on Google Workspace often use both.
Claude vs Copilot. Copilot wins inside Microsoft apps, because it reads your email, files and meetings where they are. Claude wins for building new work: decks, reports and finished files. Microsoft itself now offers Claude models inside parts of Copilot (TechRepublic).
Gemini vs ChatGPT. Gemini is the better fit if your team lives in Google Workspace and wants AI included in the subscription. ChatGPT is the better fit for images, agent mode and its plugin directory, whichever office suite you use.
For the two most common decisions in more depth, see Claude vs ChatGPT for Business and ChatGPT vs Copilot for Business.
Start From the Software You Already Use
- On Microsoft 365: Copilot for in-app work, plus Claude or ChatGPT for decks, images and work outside Office.
- On Google Workspace: Gemini for in-app work, plus Claude or ChatGPT for the same reasons.
- On neither, or both: start with Claude or ChatGPT, then add the one that covers your gaps.
Why Most Teams End Up With More Than One
Each AI keeps adding tools the others don't have, so the best choice for a given job keeps moving. Teams that commit to one either miss the best tool for some jobs or rebuild their setup when they switch.
The cost of using several is consistency. Each AI keeps its own projects, Gems, GPTs or agents, and none of them can see the others. The same company background and templates end up copied into each one, and the copies drift.
Try It: Map Your Team's Jobs
- List the ten things your team asks AI to do most.
- Put each one against the table above.
- Count how many AIs that gives you. For most teams it's two or three.
- Write down what all of them need to know about your business. That shared list is what to keep in one place.
Where Contexta Fits
Contexta gives every AI your team uses the same starting point. A skill tells your AI what to do. Your knowledge base shows it how, in detail. Your company context tells it who it's for. The Contexta harness brings them together, in every AI.
Claude, ChatGPT and Cursor are tested with Contexta. Copilot and Gemini aren't tested yet, so check Integrations for the current list. Your knowledge base stays in your own SharePoint or Google Drive, and every skill keeps its version history.