# Which AI Should I Use? A Plain-English Guide (2026) > Which AI should you use at work? A plain-English table by job: email, spreadsheets, research, meetings, images, Microsoft or Google, client data, budget. Source: https://learn.ynteractive.com/content/compare/which-ai-should-i-use · Updated 2026-10-08 · Free from Stepthrough (https://learn.ynteractive.com) Quick answer Use the AI that lives where your work already is: **Microsoft Copilot** if your office runs on Outlook, Word, Excel and Teams, **Gemini** if it runs on Gmail and Google Docs, and **ChatGPT** or **Claude** if you want a strong general assistant in its own app. Add **Perplexity** when you need answers with sources. For confidential client work, the plan matters more than the brand: use a business plan your company has approved, where your data is not used for training by default. Last updated October 8, 2026 By [Robert Breen](https://learn.ynteractive.com/content/about) · Published October 8, 2026 · Prices and features checked as of October 2026 This guide is for office workers and small and mid-size business owners who want a straight answer, not a ranking. The table below picks a tool for each common job, as of October 2026, and links the free Stepthrough lesson where you can practice it. If you only try one thing today, the free [Prompt Writing 101 lesson](https://learn.ynteractive.com/content/prompt-writing-101-role-context-task-format) teaches the four-part prompt that works in every one of these assistants. ## How do they compare at a glance? **Which AI to use for each job, as of October 2026 (pick the first tool your company already pays for)** | Job | Pick this when | Practice it free | | --- | --- | --- | | Writing and replying to email | Any of the big four works. Use **Gemini** inside Gmail or **Copilot** inside Outlook if you have them; otherwise **ChatGPT** or **Claude** with the facts pasted in. | [Reply Faster: Customer Emails](https://learn.ynteractive.com/content/chatgpt-reply-to-customer-emails), [Gemini in Gmail](https://learn.ynteractive.com/content/gemini-in-gmail-summarize-and-reply), [Your first chat with Claude](https://learn.ynteractive.com/content/claude-first-chat-tutorial) | | Analyzing spreadsheets | **Copilot** if the file lives in Excel, **Gemini** if it lives in Google Sheets. **ChatGPT** and **Claude** work on an uploaded file, and Claude's paid plans include Claude in Excel. | [Artifacts: build a price calculator](https://learn.ynteractive.com/content/claude-artifacts-tutorial); a spreadsheet lesson is coming | | Research with sources | **Perplexity** for quick cited answers, **ChatGPT** or **Gemini** deep research for longer reports, **Gemini Notebook** to answer only from your own documents. | [Get Your Business Recommended by ChatGPT](https://learn.ynteractive.com/content/get-recommended-by-chatgpt), [Gemini Notebook](https://learn.ynteractive.com/content/notebooklm-gemini-notebook-cited-answers-briefing-doc) | | Meetings and notes | **Copilot** in Teams or **Gemini** in Meet if your plan includes it; otherwise paste the transcript into **ChatGPT** or **Claude**. See the [meeting note-taker comparison](https://learn.ynteractive.com/content/compare/fathom-vs-fireflies-vs-otter) for dedicated tools. | [Summarize a Meeting Transcript](https://learn.ynteractive.com/content/chatgpt-summarize-meeting-transcript), [Summarize a Client Meeting](https://learn.ynteractive.com/content/chatgpt-client-meeting-recap-accounting-firm) | | Long documents and contracts | **Claude** is a strong pick for reading long contracts and policies and quoting the exact clause; **ChatGPT** and **Gemini** also handle large files on paid plans. | [Check a contract for red flags with Claude](https://learn.ynteractive.com/content/check-a-contract-for-red-flags-with-claude) | | Coding and light automation | **ChatGPT** or **Claude** to write formulas and scripts; **n8n**, Zapier or Make to run AI on a schedule. See [Zapier vs Make vs n8n](https://learn.ynteractive.com/content/compare/zapier-vs-make-vs-n8n). | [AI Social Media Idea Agent](https://learn.ynteractive.com/content/n8n-ai-agent-tutorial-google-sheets), [AI Email Responder](https://learn.ynteractive.com/content/ai-email-responder-gmail-drafts-n8n) | | Images | **ChatGPT** for posters and social graphics with exact text; **Gemini** is a strong alternative on Google accounts. | [Make Images with ChatGPT for Your Business](https://learn.ynteractive.com/content/make-images-with-chatgpt-for-your-business) | | Working inside Microsoft 365 | **Microsoft Copilot**. Copilot Chat comes at no extra cost with eligible Microsoft 365 plans; the paid add-on puts Copilot inside Word, Excel, Outlook and Teams. | Copilot lessons are coming; read [Copilot vs ChatGPT for work](https://learn.ynteractive.com/content/compare/copilot-vs-chatgpt-for-work) | | Working inside Google Workspace | **Gemini**. Every Workspace business plan lists Gemini in Gmail; Business Standard and up add it in Docs, Meet and more. | [Gemini in Gmail](https://learn.ynteractive.com/content/gemini-in-gmail-summarize-and-reply), [Gmail Filters, Labels and AI Drafts](https://learn.ynteractive.com/content/gmail-filters-labels-ai-draft-replies) | | Privacy-sensitive client data | A **business plan** your company has approved: ChatGPT Business or Enterprise, Claude Team or Enterprise, Gemini in Workspace or Copilot on a work account. Never a personal account. | [Reply Faster: Client Case Updates](https://learn.ynteractive.com/content/chatgpt-client-case-update-email-law-firm), [Check a contract for red flags](https://learn.ynteractive.com/content/check-a-contract-for-red-flags-with-claude) | | Tight budget | Start free. ChatGPT, Claude, Gemini, Copilot and Perplexity all have free plans; pay about $20 a month only when you hit the limits. See [free vs paid AI plans](https://learn.ynteractive.com/content/compare/free-vs-paid-ai-plans). | [Prompt Writing 101](https://learn.ynteractive.com/content/prompt-writing-101-role-context-task-format) | Prices and features as listed on each vendor's own pages, as of October 2026. Plans change often, so check the vendor's pricing page before you buy. Sources are at the end of this page. ## What is the simplest way to choose an AI tool? Ask three questions in order. First, what does your company already pay for? If you have Microsoft 365, try Copilot Chat; if you have Google Workspace, try Gemini in Gmail. Second, what does your company allow? Many firms approve one assistant for client work, and that decides it. Third, what is the job? The table above gives a sensible default for each one. If nothing is decided for you, start with ChatGPT or Claude. Both are general assistants with a free plan, both work with any email system, and their individual paid plans cost $20 a month as of October 2026. The skills you learn in one carry straight over to the other. ## Which AI companies make these tools? A handful of companies build the models behind almost every AI tool you will meet at work. [OpenAI](https://learn.ynteractive.com/content/glossary/openai) makes ChatGPT and the [GPT models](https://learn.ynteractive.com/content/glossary/gpt-models). [Anthropic](https://learn.ynteractive.com/content/glossary/anthropic) makes Claude. [Google DeepMind](https://learn.ynteractive.com/content/glossary/google-deepmind) builds Gemini. Microsoft makes Copilot, which runs on models from OpenAI and, as of October 2026, Anthropic too. [Perplexity](https://learn.ynteractive.com/content/glossary/perplexity) builds a search assistant on top of several of these models. Others matter more for developers and IT teams: [Meta AI](https://learn.ynteractive.com/content/glossary/meta-ai) and its open-weight [Llama](https://learn.ynteractive.com/content/glossary/llama) models, [Mistral AI](https://learn.ynteractive.com/content/glossary/mistral-ai) in France, [xAI](https://learn.ynteractive.com/content/glossary/xai), which makes [Grok](https://learn.ynteractive.com/content/glossary/grok), and [DeepSeek](https://learn.ynteractive.com/content/glossary/deepseek) in China. Each glossary page covers what the company makes, who it suits, how it treats your data and how to try it. ## Does the AI model matter more than the app? For most office work, no. Every major assistant now runs a [frontier model](https://learn.ynteractive.com/content/glossary/frontier-model) or something close to it, and each app picks a model for you, often with a [model router](https://learn.ynteractive.com/content/glossary/model-router). What changes your day is the app around the model: whether it sits inside your email, whether it can see your files, how it handles your data and what your company has approved. The model does matter in two cases. When you build automations, you choose the model yourself and pay by the token, so the cheaper tiers of a [model family](https://learn.ynteractive.com/content/glossary/model-family) save real money; [token pricing](https://learn.ynteractive.com/content/glossary/token-pricing) explains how to read the price list. And for genuinely hard work, such as a long contract or a messy analysis, the top model is worth the extra time. ## Which AI is safest for client and customer data? The safest choice is a business plan, not a particular brand. As of October 2026, OpenAI says ChatGPT Business, Enterprise and API data are not used for training by default; Anthropic says the same for Claude Team, Enterprise and the API; Google says Gemini in Workspace does not use customer data to train models without permission; and Microsoft's [enterprise data protection](https://learn.ynteractive.com/content/glossary/enterprise-data-protection) covers Copilot Chat when you sign in with a work account. Personal plans are different. ChatGPT, Gemini, Grok and Mistral's assistant can use personal chats for training unless you change a setting, and Claude asks you to choose. DeepSeek's privacy policy says it stores data in China. Whatever you use, follow your [AI acceptable use policy](https://learn.ynteractive.com/content/glossary/ai-acceptable-use-policy) and remove details the AI does not need. ## How do I test which AI fits my job? Give the same real task to two or three assistants, word for word, with the same facts. A renewal reminder email or a meeting recap is ideal. Then score each answer on the facts it got right, what it invented and how much you had to fix. The winner for your task is often obvious within ten minutes, and a second message asking for changes tells you more than the first answer. A hands-on Stepthrough lesson that runs one office task through ChatGPT, Claude, Gemini and Copilot side by side is coming. Until then, the head-to-head pages below compare the assistants two at a time. ## Which head-to-head comparison should I read next? Pick the pair you are deciding between: [ChatGPT vs Claude](https://learn.ynteractive.com/content/compare/chatgpt-vs-claude), [ChatGPT vs Gemini](https://learn.ynteractive.com/content/compare/chatgpt-vs-gemini), [Claude vs Gemini](https://learn.ynteractive.com/content/compare/claude-vs-gemini), [Copilot vs ChatGPT for work](https://learn.ynteractive.com/content/compare/copilot-vs-chatgpt-for-work) or [Perplexity vs ChatGPT vs Gemini for research](https://learn.ynteractive.com/content/compare/perplexity-vs-chatgpt-vs-gemini-for-research). For prices on one page, see [ChatGPT vs Claude vs Gemini vs Copilot](https://learn.ynteractive.com/content/compare/chatgpt-vs-claude-vs-gemini-vs-copilot). If you are choosing for a whole business, read [the best AI for small business](https://learn.ynteractive.com/content/compare/best-ai-for-small-business). For a specific job, there are guides for [accountants and bookkeepers](https://learn.ynteractive.com/content/compare/best-ai-for-accountants) and [recruiters and HR](https://learn.ynteractive.com/content/compare/best-ai-for-recruiters). ## Who is each one for? ### ChatGPT The most familiar general assistant: writing, summarizing, images, research and files in one app, with a free plan and Plus at $20 a month as of October 2026. Most free Stepthrough lessons use it, starting with [Prompt Writing 101](https://learn.ynteractive.com/content/prompt-writing-101-role-context-task-format). ### Claude A strong pick for long documents, careful writing and contract or policy review. Free plan, Pro at $20 a month, and Team plans for businesses. Start with [Your first chat with Claude](https://learn.ynteractive.com/content/claude-first-chat-tutorial). ### Gemini The natural choice for Gmail and Google Workspace teams, because it works inside Gmail, Docs and Sheets. Practice in [Gemini in Gmail](https://learn.ynteractive.com/content/gemini-in-gmail-summarize-and-reply). ### Microsoft Copilot The natural choice for Microsoft 365 offices, with Copilot Chat at no extra cost on eligible plans and enterprise data protection on work accounts. A free Stepthrough lesson for Copilot is coming. ### Perplexity The research specialist: short answers with numbered sources to check. Free plan and Pro at $20 a month, as listed in its help center as of October 2026. ## Which of these tools have a free Stepthrough lesson? - **ChatGPT:** free lesson: [Reply Faster: Turn a Messy Customer Email Thread into a Clear, Friendly Reply](https://learn.ynteractive.com/content/chatgpt-reply-to-customer-emails) - **Claude:** free lesson: [Your First Chat with Claude: Models, Files and a Great First Prompt](https://learn.ynteractive.com/content/claude-first-chat-tutorial) - **Gemini:** free lesson: [Gemini in Gmail: Summarize a Thread and Draft the Reply](https://learn.ynteractive.com/content/gemini-in-gmail-summarize-and-reply) - **Microsoft Copilot:** a free Stepthrough lesson is coming. - **Perplexity:** a free Stepthrough lesson is coming. ## Practice it free, step by step **Prompt Writing 101: Role, Context, Task, Format**. Ask ChatGPT for the same customer email twice, once vaguely and once with a four-part prompt, and see exactly why structure gets a better answer. You do every step yourself in a practice copy of ChatGPT, it checks your work as you go, and “Do it for me” finishes any step you get stuck on. Free, and nothing touches your real accounts. [Start the free lesson](https://learn.ynteractive.com/modules/prompt-writing-101) [Or read the full step-by-step guide](https://learn.ynteractive.com/content/prompt-writing-101-role-context-task-format) ## Watch it in a free lesson: Same Task, Four Assistants: ChatGPT vs Claude vs Gemini vs Copilot ### Same Task, Four Assistants: ChatGPT vs Claude vs Gemini vs Copilot: video walkthrough Full walkthrough · 1:47 · with captions Give one real office task to ChatGPT, Claude, Gemini and Microsoft Copilot, check each answer on the facts, and pick the one to use at work. The whole lesson narrated step by step, recorded in Stepthrough’s simulated practice environment. [Watch it with chapters and the full transcript](https://learn.ynteractive.com/content/chatgpt-vs-claude-vs-gemini-vs-copilot-same-task#watch) From the free lesson [Same Task, Four Assistants: ChatGPT vs Claude vs Gemini vs Copilot](https://learn.ynteractive.com/content/chatgpt-vs-claude-vs-gemini-vs-copilot-same-task) ## Key takeaways - Use the AI built into the tools you already pay for: Copilot for Microsoft 365, Gemini for Google Workspace. - For a standalone assistant, ChatGPT and Claude are both strong; their individual paid plans are $20 a month as of October 2026. - For client data, the plan matters more than the brand: use an approved business plan with no training by default. - Perplexity is the specialist for answers with sources; check the citations before you repeat a claim. - Test with your own task: the same prompt in two assistants tells you more than any ranking. ## Frequently asked questions ### What is the best AI for work in 2026? There is no single best one. For most offices the best is the one built into their existing tools: Copilot for Microsoft 365, Gemini for Google Workspace. Without either, ChatGPT and Claude are the strongest general assistants. ### Is it worth paying for more than one AI? Usually not at first. Start with one paid plan, or none, and learn to prompt it well. Add a second tool only for a job the first one does badly, such as cited research or work inside your office suite. ### Which free AI is best? All of the big assistants have useful free plans. ChatGPT, Claude and Gemini are the strongest for writing; Perplexity's free plan is good for quick cited answers; Copilot is free for Microsoft account holders. ### Are open-weight models like Llama or DeepSeek an option for my business? Yes, if you have IT help. An [open-weight model](https://learn.ynteractive.com/content/glossary/open-weight-model) can run on your own servers so data stays in-house, but someone has to set it up and maintain it. Most small offices are better served by a business plan from a major vendor. ## Where do these prices and features come from? Every price and feature on this page was checked against the vendor's own page, as of October 2026. No numbers here are estimates or third-party figures. The example businesses in the Stepthrough lessons are made up. - [OpenAI: ChatGPT pricing](https://chatgpt.com/pricing) - [OpenAI: Enterprise privacy](https://openai.com/enterprise-privacy/) - [Anthropic: Claude plans and pricing](https://claude.com/pricing) - [Google: Gemini subscriptions](https://gemini.google/subscriptions/) - [Google Workspace pricing](https://workspace.google.com/pricing) - [Microsoft Copilot business pricing](https://www.microsoft.com/en-us/microsoft-365-copilot/pricing) - [Microsoft Learn: Enterprise data protection in Copilot](https://learn.microsoft.com/en-us/microsoft-365/copilot/enterprise-data-protection) - [Perplexity Help Center: Perplexity Max](https://www.perplexity.ai/help-center/en/articles/11680686-perplexity-max) ## Free lessons mentioned on this page - [Prompt Writing 101: Role, Context, Task, Format](https://learn.ynteractive.com/content/prompt-writing-101-role-context-task-format): Ask ChatGPT for the same customer email twice, once vaguely and once with a four-part prompt, and see exactly why structure gets a better answer. - [Reply Faster: Turn a Messy Customer Email Thread into a Clear, Friendly Reply](https://learn.ynteractive.com/content/chatgpt-reply-to-customer-emails): Turn a messy customer email thread into a clear, friendly reply: give ChatGPT the thread and your facts, check every promise, fix the tone, and send it from Gmail. - [Your First Chat with Claude: Models, Files and a Great First Prompt](https://learn.ynteractive.com/content/claude-first-chat-tutorial): Pick a model, attach a customer's complaint email with the + menu, write a four-part prompt, read Claude's reply, ask a follow-up, then star and rename the chat. - [Gemini in Gmail: Summarize a Thread and Draft the Reply](https://learn.ynteractive.com/content/gemini-in-gmail-summarize-and-reply): Catch up on a long email thread in seconds with Summarize this email, ask Gemini what you owe, then write, refine and polish the reply with Help me write. - [Summarize a Meeting Transcript with ChatGPT](https://learn.ynteractive.com/content/chatgpt-summarize-meeting-transcript): Paste a long meeting transcript into ChatGPT and get the decisions, an action items table with owners and due dates, and a follow-up email ready to send. - [Check a Contract for Red Flags with Claude](https://learn.ynteractive.com/content/check-a-contract-for-red-flags-with-claude): Upload a vendor contract, get it in plain English, find the risky clauses with the exact words quoted, draft questions for the vendor, and save the review as a project… ## Related posts - [OpenAI API vs ChatGPT Plus: What You Pay For](https://learn.ynteractive.com/content/blog/openai-api-vs-chatgpt-plus): OpenAI API vs ChatGPT Plus: why your ChatGPT plan doesn't power n8n, how pay-per-request API billing works, and how to set up a… - [Is It Safe to Paste Client Emails into ChatGPT?](https://learn.ynteractive.com/content/blog/is-it-safe-to-paste-client-data-into-chatgpt): Is it safe to put client data in ChatGPT? A practical checklist: what to remove first, which plan settings to check, and the… ## Related terms Plain-English definitions, each with an example from a free lesson. [OpenAI](https://learn.ynteractive.com/content/glossary/openai) · [Anthropic](https://learn.ynteractive.com/content/glossary/anthropic) · [Google DeepMind](https://learn.ynteractive.com/content/glossary/google-deepmind) · [Microsoft Copilot](https://learn.ynteractive.com/content/glossary/microsoft-copilot) · [Perplexity](https://learn.ynteractive.com/content/glossary/perplexity) · [Frontier model](https://learn.ynteractive.com/content/glossary/frontier-model) · [Enterprise data protection](https://learn.ynteractive.com/content/glossary/enterprise-data-protection) · [Model family](https://learn.ynteractive.com/content/glossary/model-family) [The full AI glossary](https://learn.ynteractive.com/content/glossary) ## More tool comparisons - [ChatGPT vs Claude vs Gemini vs Copilot for office work](https://learn.ynteractive.com/content/compare/chatgpt-vs-claude-vs-gemini-vs-copilot): ChatGPT vs Claude vs Gemini vs Copilot for office work: October 2026 prices side by side, which fits Gmail or Outlook teams, and which to try first. - [ChatGPT vs Claude for work: which should you use?](https://learn.ynteractive.com/content/compare/chatgpt-vs-claude): ChatGPT vs Claude for office work: October 2026 plans and prices side by side, how each handles your data, and which to pick for email and documents. - [Copilot vs ChatGPT for work: which should your team use?](https://learn.ynteractive.com/content/compare/copilot-vs-chatgpt-for-work): Microsoft Copilot vs ChatGPT for work: October 2026 prices, what's free with Microsoft 365, data protection, and which fits Outlook and Teams offices. [All tool comparisons](https://learn.ynteractive.com/content/compare) · [All free tutorials](https://learn.ynteractive.com/content)