You've already used ChatGPT. Module 1 ran through the basics. This module is about going deeper, specifically, the features of ChatGPT's free tier that are genuinely useful for career-shifters and beginners, and the limitations you need to know about before you rely on it for anything important.
ChatGPT is built by OpenAI. At the time of writing, it's the most widely used AI tool in the world by a significant margin. That's partly network effects, partly first-mover advantage, and partly because the free tier is legitimately generous. For beginners especially, the feature set available at no cost is broader than most people realise.
Image input: point and ask
ChatGPT's free tier can accept images. You can upload a photo, a screenshot, or a diagram, and ask ChatGPT to analyse, explain, or respond to it.
For beginners learning a new field, this is genuinely useful.
Specific use case: You're reading a textbook chapter, and there's a diagram or chart that you understand in parts but can't fully follow. Snap a photo with your phone, upload it to ChatGPT, and ask: "Can you explain what this diagram is showing me in plain English? I understand [part you get] but I'm not clear on [part that's confusing you]."
The response will usually be better than any generic text description because ChatGPT is responding to the actual visual, not an abstraction.
Another use case: You've received a job offer with a complicated contract. Take a screenshot of any clause you're not sure about and ask: "What does this clause mean in practice? Are there any terms here I should push back on?" (Always pair this with professional advice for anything high-stakes. But for an initial read, it's useful.)
What doesn't work: Low-resolution or badly lit photos. If the text in an image is too small or blurry to read clearly, ChatGPT will struggle with it. The image needs to be legible.
Voice mode: think out loud
ChatGPT has a voice mode in the mobile app, and a more advanced voice mode ("Advanced Voice") on paid tiers. The basic version is available for free.
Voice mode is useful for a specific kind of task: thinking out loud.
Career-shifters often have thoughts and concerns that are half-formed. They're not ready to write a structured prompt. They want to talk through a decision, a worry, or an idea with something that will respond intelligently. Voice mode is good for this.
You might use it during a walk or a commute: "I'm trying to work out if it makes sense to do a master's degree or whether I should just build skills on the job. I'm 34, I've been in hospitality for 12 years, and I'm trying to move into project management. Here's my thinking so far..."
ChatGPT will respond, ask clarifying questions, and help you structure your thinking. It's not as capable as Claude for complex reasoning, but for the "rubber duck" function, talking through something to figure out what you actually think, it works well.
Code interpreter and basic data analysis
If you have a spreadsheet with data and you want to understand what it's telling you, ChatGPT's Code Interpreter (available in the free tier as "Analyse data") can help.
This is most relevant if you're moving into roles that involve any quantitative analysis: business analysis, project management, data work, operations. You upload a CSV or Excel file and ask questions about it.
Beginner use case: You've collected salary data from Seek or LinkedIn for roles you're targeting. You've put it in a spreadsheet. You can upload it to ChatGPT and ask: "What does this data tell me about the salary range for this role in Melbourne? Are there patterns I should note, does location affect salary, does company size matter, anything obvious?"
You don't need to know how to write code. ChatGPT writes the code to analyse the data and gives you the output. This is a genuinely useful capability for anyone whose new target field involves working with data.
Browsing and custom GPTs
ChatGPT can browse the web. This is one of its real advantages over Claude in default mode (without third-party integrations). If you ask ChatGPT about something current, a company you're researching, a recent development in your target industry, current job market data, it can find and return current information.
This doesn't make it immune to the problems described in Module 3. AI with browsing can still summarise unreliable sources, miss things, or present outdated information from an old web page. But it's substantially better than a model with no web access for time-sensitive questions.
Custom GPTs are user-created AI configurations that are set up for specific purposes. People have built custom GPTs for things like interview prep, resume review, IELTS tutoring, legal document summarising, and hundreds of other use cases. You can find them in the ChatGPT store.
For beginners, the most useful one is often a "study buddy" style GPT for whatever field you're learning. Find one related to your target area (data analytics, project management, UX design, whatever you're moving into), try it, and see if it's useful. They vary wildly in quality. Try a few before committing to one.
You can also make your own. A beginner-accessible custom GPT setup might be: "You are a study tutor helping me prepare for a project management certification. When I describe a concept, quiz me on it using the Socratic method. Don't give me the answer; ask me a question that helps me figure it out."
This is a fifteen-minute setup, once, that changes how you study for however long you're working on that certification.
The honest weaknesses
Hedging and sycophancy. ChatGPT has a documented tendency to agree with you and soften its critiques. If you tell it your cover letter is good and ask for feedback, there's a reasonable chance it will confirm that it's good and then add gentle suggestions. Claude tends to be more direct in its criticism. For tasks where you want honest feedback, keep this in mind.
Occasional confident incorrectness. All models do this, but many users find ChatGPT produces it more often on factual questions than Claude. This is hard to verify rigorously, and it varies between model versions; the verification habit from Module 3 applies regardless of which model you're on.
Paid tier cost. ChatGPT Plus is real money, not enormous but real. The free tier is genuinely useful; you don't need to pay to get value. The paid tier unlocks higher usage limits, more advanced model access, more custom GPT creation, image generation, and Advanced Voice. Whether it's worth it depends on how much you actually use it. OpenAI publishes the current price and feature split on their site.