Copilot vs ChatGPT: Which One Should You Use?

Two AI assistants have become household names over the last couple of years: Microsoft Copilot and OpenAI ChatGPT. Both can answer questions, help you write, and assist with research. But they are built differently, live in different places, and are best suited for different kinds of work. If you are trying to figure out which one to use – or whether you need both – this guide walks you through everything you need to know.

What Is Microsoft Copilot?

Microsoft Copilot is an AI assistant made by Microsoft. It is built directly into Windows 11, the Edge browser, and Microsoft 365 apps including Word, Excel, Outlook, and Teams. You do not need to download anything extra to use the basics – if you have Windows 11 or a Microsoft 365 subscription, Copilot is already available to you.

Copilot is powered by the same underlying technology as ChatGPT. Microsoft has a deep partnership with OpenAI and uses OpenAI models in its products. But Microsoft has tuned Copilot specifically for productivity tasks inside its own software, so the experience feels different even though the engine is similar.

The free version of Copilot is built into Windows and the Edge browser and handles general questions and chat. Copilot Pro costs $20 per month and unlocks deeper integration with Microsoft 365 – drafting emails inside Outlook, summarizing documents inside Word, and analyzing data inside Excel without ever switching to a separate tool.

What Is ChatGPT?

ChatGPT is an AI assistant made by OpenAI – the company that created the technology that powers much of the current wave of AI tools. It lives at chat.openai.com and in iOS and Android apps. Unlike Copilot, it is not built into any operating system or productivity suite. It is a standalone tool you open when you need it.

ChatGPT is designed for open-ended conversation. You can ask it to write, research, explain, code, brainstorm, translate, or answer almost any question you can think of. It is extremely flexible – you bring the context and it works with whatever you give it.

ChatGPT offers a free tier that gives you access to GPT-4o with some daily usage limits. ChatGPT Plus costs $20 per month and removes most of those limits, adds faster responses, priority access during busy periods, and includes image generation through DALL-E built right into the chat.

Where Each Tool Lives

This is one of the most important practical differences between the two tools, and it often determines which one is right for you.

Copilot lives inside Microsoft’s world. You access it through the Windows taskbar, through a sidebar in Edge, or – with Copilot Pro – directly inside Word, Excel, Outlook, and Teams. If you are already working in one of those apps and you need help, Copilot is right there. No switching windows, no copying and pasting – just click and ask.

ChatGPT lives at chat.openai.com or in the mobile app. You go to ChatGPT, have your conversation, and then take the output back to wherever you need it. It requires an extra step compared to Copilot’s in-app integration, but that flexibility also means you can use it for almost anything – not just tasks connected to Microsoft software.

On mobile, both tools have apps. ChatGPT’s mobile app is widely used and well-designed. Copilot also has a standalone mobile app, though most people encounter it through Microsoft 365 on their phones.

Price Comparison

Both tools offer a free version and a paid tier at the same monthly price. Here is how they break down:

• Copilot free – Built into Windows 11 and Edge at no charge. Handles general chat but does not integrate inside Office apps.
• Copilot Pro – $20 per month – Adds deep integration with Word, Excel, Outlook, Teams, and PowerPoint. Priority access during peak times and faster responses.
• ChatGPT free – Access to GPT-4o with daily usage limits. Works in browser and mobile app. Good for occasional use.
• ChatGPT Plus – $20 per month – Higher limits on GPT-4o, image generation with DALL-E, faster responses, and early access to new features.

At the same $20 per month price, the right choice depends entirely on your workflow. If you spend most of your day in Microsoft Office, Copilot Pro is the clearer choice. If you need a flexible AI assistant for a wide range of tasks outside of Office, ChatGPT Plus gives you more room to work.

Side by Side – Everyday Tasks

Here is a direct comparison of how each tool handles the most common everyday tasks:

Writing and Editing Emails

Copilot has a clear advantage here for Outlook users. With Copilot Pro, you can open an email thread in Outlook, click the Copilot button, and ask it to draft a reply or summarize the thread – without leaving the app. The context is automatic because Copilot can read the email directly. ChatGPT requires you to copy the email, paste it into the chat, explain the situation, and then copy the reply back into Outlook. It works, but it takes more steps.

Summarizing Documents

Copilot again wins for Office users. Open a Word document, click Copilot, and ask for a summary. Done. With ChatGPT, you need to copy the text and paste it in first. For longer documents this becomes cumbersome, though ChatGPT handles large amounts of text well once you have it in the chat window.

Coding Help

ChatGPT is the stronger choice for coding tasks. It supports a wider range of programming languages, generates longer and more complete code blocks, and handles complex debugging conversations with more depth. Copilot can answer basic coding questions but coding assistance is not its primary strength – it is built for productivity, not development work.

Image Generation

Both tools can generate images. ChatGPT Plus includes DALL-E for image creation inside the chat. Copilot – even the free version – includes image generation through Microsoft Designer. For most everyday image requests, both produce similar quality results. Neither requires a separate subscription for this feature at the paid tier.

Who Should Use Which

Here is the simple breakdown:

• Use Copilot if you spend most of your workday inside Microsoft Office – Word, Excel, Outlook, or Teams. The in-app integration saves real time on email drafting, document summaries, and data questions, and you are paying for it anyway with a Microsoft 365 subscription.
• Use ChatGPT if you need a flexible, general-purpose AI assistant for writing, research, brainstorming, coding, learning, or creative projects. It is more capable outside of the Microsoft ecosystem and easier to use for open-ended, wide-ranging tasks.
• Use the free versions of both if you just want to experiment with AI before committing to a paid plan. Copilot free is built into Windows already – no setup needed. ChatGPT free is genuinely useful for most casual tasks.

Can You Use Both?

Yes – and a lot of people do. The tools complement each other naturally. Copilot handles the in-context work inside Office apps, while ChatGPT handles open-ended conversations, longer writing projects, and tasks that go beyond what Copilot’s Office integration covers.

If budget is a concern, pick one. If you are a heavy Microsoft 365 user, start with Copilot Pro. If you do most of your work outside of Office or you do not use Microsoft 365, ChatGPT Plus is the stronger standalone investment.

Think of it this way: Copilot is the AI that lives inside your work apps. ChatGPT is the AI you go to when you want to think something through, write something from scratch, or tackle a task that does not fit neatly inside a Microsoft document. Both are useful. Neither replaces the other completely.