How to use ChatGPT at work, and when do you need more than a chat?
What ChatGPT does well in a business, what not to put into it and how to move from a plain chat to something that runs on its own every day
ChatGPT at work pays off when you give it a specific task, with a clear instruction, and always check the result. For drafts, summaries and emails it is already valuable. When the same job repeats every day and has to update your systems, though, a chat is not enough.
And most Greek workers already use tools like this. According to PwC Greece's "Hopes and Fears 2026" survey, published in September, about two in three use generative AI tools at least once a week.
So how can so many people use it while the work still gets done the same way?
What does ChatGPT do well in a business?
ChatGPT does well at work that starts with a text and ends with a text: a first draft of an email, the summary of a meeting, a quote in clearer wording, a translation, a list of ideas. That is where you save time from day one.
Three examples, from three very different sectors:
At a Greek bank. Alpha Bank announced in July 2025 that more than 300 of its employees use Copilot, a similar tool from Microsoft, to write and summarise emails, prepare documents and draft meeting summaries. According to the bank's internal survey of its first users, they save on average about a quarter of their time on these tasks.
At a network of tax advisory offices. Germany's HSP GRUPPE says on its website that it uses ChatGPT Enterprise for office tasks such as job ads, cover letters and specialist texts, and that it always checks the result for accuracy.
In retail. In October 2025, the US retail chain Walmart announced it was giving ChatGPT Enterprise to teams across the company. Along with the tool, though, it gave something else: training for its employees on how to use it.
And smaller Greek businesses? Unfortunately, examples are few to none. While writing this article we searched and did not find a single Greek small or medium-sized business describing publicly, in its own words, how it uses ChatGPT in its work.
In all three cases, the tool helps a person do their job faster. The person, though, is still the one who writes the instruction, reads the result and decides. We wrote in detail about where AI stops and where you need human judgement in an earlier article.
Why does the work often not change at all?
In most businesses, everyone uses ChatGPT on their own, in their own way, and copies the result by hand into an email or into the company's software. The time they save stays with them. The company's process does not change.
In April 2026, an analysis presented to the Hellenic Federation of Enterprises (SEV) reached the same conclusion: AI tools that simply assist the employee are a starting point, but most of the benefit comes when entire processes are redesigned.
Three signs this is happening to you too:
- You ask ChatGPT the same question every day and copy the answer somewhere else.
- Three people on your team do the same job with three different instructions, and get three different results.
- Nobody knows what may and may not be typed into the tool.
How do you write good instructions (prompts) for ChatGPT?
A good prompt (the instruction we give the AI) is clear, specific and gives enough context. That is also the core advice from OpenAI itself, the company that makes ChatGPT.
In practice, an instruction that works has four parts:
- Who you are and who you are writing to. "I run reservations at a hotel in Crete. I'm writing to a German guest."
- Exactly what you want. "Reply to the email below. Confirm the booking and tell him the airport transfer is not included."
- An example. Paste in an earlier reply you liked, so it picks up your style.
- The format. "Five lines at most, polite tone. Don't promise anything I haven't mentioned."
And don't expect the perfect result the first time. Correct it, ask for changes, try again. Once you find the instruction that works, keep it and share it with your team. That is where the work of the whole business starts to change, not just the work of one person.
Is it safe to put personal data into ChatGPT?
Whether it is safe to put personal data into ChatGPT depends on your subscription: personal or business. On personal accounts (free or Plus), OpenAI says it may use your conversations to train its models, unless you turn off the "Improve the model for everyone" option in your account settings (Settings > Data controls).
On business subscriptions (ChatGPT Business and Enterprise), OpenAI states that by default it does not use your data to train its models.
Greeks care about this too. In the 2026 Eurobarometer, almost half of respondents in Greece named, as their main concern about generative AI tools, the protection of privacy and personal data.
Three simple rules for a business:
- Don't put customer details (names, phone numbers, tax IDs, medical or financial data) into personal accounts. GDPR applies here too.
- If your team works with that kind of data every day, use a business subscription and write the rules on a single page: what is allowed and what is not.
- Always check the result before it goes to a customer. HSP GRUPPE applies the same rule.
ChatGPT, Gemini or Copilot: which should you choose?
Between ChatGPT, Gemini and Copilot, choose the one already built into the tools you work with. If your business runs on Gmail, Google Drive and Google Calendar, Google's Gemini is already inside your tools. If you work in Outlook, Word and Excel, Microsoft's Copilot is the equivalent. ChatGPT is the independent option, which does not tie you to either of the two.
All three are good tools. For a small business, the choice rarely comes down to which one "writes better". It comes down to whether the tool can reach your data and whether your team knows how to use it.
When do you need more than a chat?
You need more than a chat when the job has to be done every day, the same way, without someone starting it by typing into a chat window. For example: every new customer email gets read, sorted, a reply prepared and your system updated. Or, for every call that comes in outside your business hours, a smart AI-powered phone assistant answers.
At that point we are no longer talking about a chat. We are talking about an AI agent, which connects to your tools and also does the work that comes after the answer.
| ChatGPT for individuals (free or Plus) | Business subscription (Business, Enterprise) | A custom AI workflow | |
|---|---|---|---|
| What it does | Answers whatever you type | The same, for the whole team, in a shared workspace | Runs one specific process on its own, from start to finish |
| How it starts | You open it, every time | Each team member opens it | It starts on its own, as soon as an email or a call comes in, or a form is filled in |
| Your data | May be used to train the models, unless you turn it off | By default, not used to train the models | As with business subscriptions: through the API, by default not used to train the models, on accounts in your own name |
| When it fits | One person, one-off tasks | A team that writes and analyses every day | Repeated work that has to update your systems |
That third option is what we build at Auttomix: Custom AI Agentic Workflows. And because a tool is only worth as much as the team using it, we also train your people to use it, the way Walmart did with its own.
AI at work: how far behind are Greek workers?
In the real benefit they get from AI, Greek workers lag behind the global average. In the same PwC survey, which covered workers in 48 countries, almost seven in ten Greek workers are in roles where AI has not yet brought them real benefit, while globally the same is true for just over half.
For a business, this means something practical. If your people each use ChatGPT on their own, the gain stays small and scattered. If you build it into your processes, it stays with the business. We wrote about a business's first steps into AI, with examples by sector, in our first article.
Where do you start in practice?
- Pick one task that happens every week and eats time: replies to routine emails, meeting summaries, quotes.
- Write one good instruction for it and share it with everyone who does the same job.
- Set what does not go into the tool: customer details, financial details, anything you would not send to a third party.
- Measure after a month: how much time you saved and where corrections were needed.
- If the same job happens every day and you copy results from one program to another, that is your first workflow to automate.
Frequently asked questions
Is ChatGPT Plus worth it for a business?
For one person who uses it every day, a paid personal subscription gives more than the free version. For a team that works with customer data, though, the right choice is a business subscription, because your data is not used by default to train the models.
Does OpenAI use my conversations on ChatGPT Plus?
It may. Plus is a subscription for individuals, so the same applies as for the free version: conversations may be used to train the models, unless you turn it off in settings. And note: if you press the thumbs up or thumbs down icon on an answer, OpenAI says it may use that whole conversation, even if you have turned it off.
Does ChatGPT write good Greek?
It writes good Greek, but not always the way a Greek would write it. Sometimes it translates word for word from English. Always read the text before you send it, especially when it is going to a customer.
Can ChatGPT do the work on its own?
Inside the chat, it does what you ask at that moment. For a job to get done every day without anyone asking, you need a workflow or an AI agent, connected to your tools and with clear limits.
Can my team learn to use it properly?
Yes, and it is worth more than you might think. A short training session on your team's real tasks, shared instructions and one rule for data make a bigger difference than which tool you pick. That is what we do too, together with our clients.
Does a customer have to know they are talking to AI?
If the customer is talking directly to an AI, yes. Since 2 August 2026, Article 50 of the EU AI Act has applied, and it requires that users are told they are interacting with an AI system.
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If you would like to look together at which work in your business would benefit from a good instruction, which needs a workflow, and how to train your team, let's talk.
Auttomix Team