Microsoft Copilot vs ChatGPT for Work: How to Choose

Post 5 of the series: Starting with Copilot Chat

Choosing between Microsoft Copilot and ChatGPT for work rarely comes down to which tool is simply “better”.

The right choice depends on the work people need to complete, where their information is stored, what company controls are required and how the organisation expects employees to use AI.

This is the final article in our Starting with Copilot Chat series.

In the earlier articles, we looked at:

• Why Microsoft 365 customers could start with Copilot Chat

• How Copilot Chat and ChatGPT Free compare

• What Copilot Chat can do with Microsoft 365 apps

• Why security, trust and compliance need leadership attention

Together, these articles lead to a practical conclusion.

The tool matters. The way an organisation introduces, manages and teaches people to use it matters just as much.

Access, Adoption and Advantage Are Different

It is useful to separate three things that are often treated as the same.

Access means the tool is available.

An organisation purchases licences, enables Copilot or provides access to a ChatGPT workspace.

Adoption means people use the tool regularly for useful work.

Employees understand when to use it, what information to provide and how to work with the result.

Advantage means the organisation can see evidence of better work.

A task is completed faster. The quality improves. Fewer corrections are needed. Communication becomes clearer. A repeated task becomes more consistent.

Access can be measured through licence activation and usage numbers. Those numbers do not show whether the tool is helping people improve their work.

An organisation can have hundreds of active users while still having very little evidence of meaningful improvement.

This is why giving employees Microsoft 365 Copilot licences is not enough.

Where Microsoft Copilot Fits

Microsoft Copilot is a sensible option for organisations whose work already happens mainly in Microsoft 365.

Employees may spend much of their day using Outlook, Teams, Word, Excel, PowerPoint, OneDrive and SharePoint. Copilot can support work across this environment, although the exact experience depends on the licence, the Microsoft 365 tool being used and the organisation’s settings.

This can make Copilot particularly useful when a task depends on information already held within Microsoft 365.

Examples include:

• Preparing for a meeting using relevant emails and documents

• Summarising a long email conversation before responding

• Drafting a document using approved source material

• Reviewing or exploring information in an Excel workbook

• Developing a presentation from an existing document

• Following up on actions from a Teams meeting

Copilot Chat and the paid Microsoft Copilot product do not provide exactly the same access or features. Organisations should understand what employees have, what it can access and what company settings apply.

The advantage is not simply that Copilot appears inside familiar Microsoft tools. The value comes from employees knowing how to use it effectively within the work they already complete.

Explore Koshima’s practical Microsoft 365 Copilot training.

Where ChatGPT Fits

ChatGPT can provide a flexible place for developing ideas, working with information, conducting research, drafting content and completing work through several stages.

Depending on the account and plan, teams may also use files, Projects and custom GPTs to organise information and support repeated types of work.

Examples include:

• Developing a report through several rounds of research and review

• Comparing documents or different options

• Turning source information into structured content

• Exploring and challenging an early idea

• Creating a repeatable workspace for a project or area of responsibility

• Building a custom GPT for a defined and regularly repeated task

The account matters. A personal ChatGPT account should not be treated as equivalent to a managed business workspace. Organisations need clear rules covering which account employees should use and what company information can be shared.

ChatGPT may be the better fit for some tasks. Microsoft Copilot may be the better fit for others. Some organisations may decide to use both, with a clear purpose and guidance for each.

Explore Koshima’s practical ChatGPT training.

Stop Comparing Empty Chat Windows

A common way to compare Copilot and ChatGPT is to open both tools, enter the same short prompt and judge which answer feels better.

This can be interesting, but it is a weak way to make a business decision.

One response may be longer. Another may be more direct. One may sound more confident or polished. None of this proves that the tool will perform better across the work an employee needs to complete.

A useful workplace comparison should start with a real task.

For example:

1. Select a task that employees complete regularly.

2. Define what a good result should contain.

3. Provide both tools with suitable source information.

4. Use the account and version employees would have at work.

5. Complete the task through the necessary stages.

6. Review the accuracy, quality and usefulness of the result.

7. Record the time, corrections and additional work required.

8. Repeat the test with several examples.

This produces better evidence than comparing the first response from one general prompt.

Our earlier article on Copilot Chat versus ChatGPT Free explores why the first impression of a tool may not show how useful it will be for real work.

Most Organisations Should Start at the Task Level

Job titles and department names are too broad to tell us where AI will create value.

A sales role may contain dozens of different tasks. Some may benefit from Copilot, some may suit ChatGPT and some may not need AI at all.

The same is true across every department.

Sales and business development

Teams can use AI to prepare for meetings, review account information, develop proposals, plan follow-ups and improve opportunity updates.

Procurement

Teams can structure business requirements, prepare RFP content, compare supplier responses, organise evaluation criteria and communicate decisions more clearly.

Marketing and communications

Teams can develop campaign ideas, work with strategy documents, adapt messages for different audiences, review content and build presentations.

HR and people teams

Teams can prepare interview materials, organise onboarding information, draft employee communications and develop reports from approved source material.

Legal and compliance

Teams can organise, compare and summarise documents to support review. Qualified people must still interpret the information, assess risk and make the final judgement.

Leadership and project teams

Teams can prepare for meetings, summarise reports, compare plans, clarify decisions and organise actions across different areas of work.

These are normal tasks that people complete every week.

The opportunity comes from improving these tasks repeatedly. A few minutes saved once has limited value. A better way of completing an important task across a team can create continuing value.

Koshima’s AI consulting work helps organisations identify these tasks, assess where AI can help and decide what should receive attention first.

Training Must Connect the Tool to Real Work

Awareness training has a clear purpose.

It helps people understand what Copilot or ChatGPT is, what it can do and the basic responsibilities that come with using it.

Task-tailored training goes further.

Employees practise using the tool on work that reflects their role. They learn how to prepare the task, provide the right information, give clear instructions, work through the result and review it critically.

A generic demonstration may show someone that Copilot can help prepare a document.

A task-tailored workshop teaches a procurement team how to use Copilot to turn approved project information into a structured first draft of an RFP scope of work.

The difference is important. The second example gives participants a method they can apply when they return to their work.

That is why Microsoft 365 Copilot training should be built around real work.

Capability also develops over time. People need opportunities to practise, use what they learned, identify problems and improve their approach.

What Determines Useful Workplace Results?

From our work with teams, six practical conditions matter.

1. Choose the Right Work

Start with tasks that are important, repeated and suitable for AI support.

Avoid introducing the tool as a solution for every task. Employees need to understand where it helps and where another approach is more appropriate.

2. Match the Tool to the Task

Consider where the relevant information is held, which company controls apply and what the employee needs the tool to do.

Copilot may make sense for work closely connected to Microsoft 365. ChatGPT may suit work that benefits from a separate, flexible workspace. The answer can differ between teams and tasks.

3. Train People Using Realistic Work

Use exercises that reflect the participants’ responsibilities, documents and decisions.

People learn more when they complete a recognisable task themselves, review the result and understand how to improve it.

4. Give People Clear Rules

Employees need simple guidance covering:

• Which accounts and tools they should use

• What information they can provide

• Which tasks require additional care

• How outputs should be reviewed

• Who remains responsible for the final result

Rules must be easy to understand and practical enough to follow during everyday work.

5. Measure the Task

Usage data can show that people opened the tool or submitted prompts. It does not show whether the work improved.

Measure the result of selected tasks instead.

Useful measures can include:

• Time required to complete the task

• Number of corrections or revisions

• Completeness of the result

• Quality against agreed criteria

• Consistency between different employees

• Confidence completing the task again

6. Continue Supporting People

One workshop can provide a strong starting point. Continued use helps people build capability.

Follow-up sessions, practical clinics and repeated exercises give employees the opportunity to bring back real problems, correct weak habits and improve how they work.

The Tool Matters. The Approach Determines the Result.

Microsoft Copilot and ChatGPT can both support valuable workplace tasks.

Copilot is often a sensible starting point for organisations whose people and information already sit inside Microsoft 365.

ChatGPT can provide a flexible environment for research, structured projects, content development and other work completed through several stages.

Some organisations will choose one. Others will use both.

The decision should be based on the work, the information required, the company’s rules and the needs of the people completing the task.

Whichever tool is selected, access alone will not produce high-quality work.

People need to understand how to prepare the task, provide the right information, guide the tool, review what it produces and improve the result.

This is how Copilot or ChatGPT moves from an available tool to a useful part of everyday work.

Help Your Team Use Copilot or ChatGPT Effectively

Koshima provides practical, non-technical training built around the work your team completes every day.

The aim is to help people produce high-quality work faster and more consistently using the AI tools your organisation has selected.

• Explore Microsoft 365 Copilot training

• Explore OpenAI ChatGPT training

• Explore AI consulting

• Discuss your team’s needs