How to Use ChatGPT and Claude to Practise for Job Interviews
Turn AI into a mock interviewer: a sample prompt, how to practise out loud, what to watch out for, and a 3-day plan before the real interview.
The night before an interview, you reread the usual questions again and again, but you never actually say an answer out loud. Then in the room, the answers you thought were ready come out long and circular. AI tools like ChatGPT or Claude can fix this: they will ask you questions as many times as you want, never get bored, and give instant feedback, as long as you know how to set them up.
What AI interview practice is and how it helps
You ask the AI to play the interviewer for the role you applied for. It asks one question at a time, waits for your answer, then critiques it against criteria you define. The value is that you practise turning thoughts into spoken answers and you meet the kind of follow-up questions real interviewers ask.
- Practise basics such as introducing yourself, strengths, weaknesses, and why you want to move
- Practise behavioral questions that require a real story
- Practise interviewing in English without feeling embarrassed
- Check whether your answers run too long, wander, or lack a concrete result
Write a prompt that makes AI a good interviewer
If you only type “please interview me”, you get generic questions that fit any job. The more context you give, the closer the questions get to the real thing.
What to include
- The full job description of the role
- The seniority level and type of company, for example a large retailer or a fintech startup
- A short summary of your experience, without personal data
- Rules: one question at a time, wait for the answer, then give feedback
Sample prompt
You are the Hiring Manager for a Marketing Executive role at a consumer goods company in Bangkok. Here is the JD: [paste JD]. Here is my experience: [5-line summary]. Interview me with 8 questions, one at a time, mixing basic and behavioral questions. After each answer, score it 1 to 5, tell me what worked and what to fix, then ask one follow-up question like a real interviewer would.
How to practise so it actually works
Speak first, type second
Interviewers listen to you; they do not read what you type. Time yourself answering out loud for 1 to 2 minutes, record it on your phone, then transcribe it and send it to the AI, or use a voice conversation mode if your app has one. This exposes filler words and rambling that you cannot see when typing.
Ask for feedback against a framework
Tell the AI to check your answer against STAR (Situation, Task, Action, Result): is every part there, is the result clear, and does your own role stand out or disappear behind “our team”? If STAR is new to you, read Answering interview questions with the STAR method.
Let the AI push back
After the first round, try: “This time, be an interviewer who is not convinced. Probe my numbers and reasoning.” You will practise handling questions like “How did you measure that?” or “What would you do differently?”, which is where many candidates stumble.
What to watch out for
- Do not memorise answers the AI writes for you. Polished answers with none of your own details are easy for interviewers to spot. Use AI as a coach, not a scriptwriter.
- AI may guess company facts wrongly. Check culture or interview process details on the company's own website and job posts.
- Do not paste confidential information such as internal sales figures, client names, or colleagues' personal data.
- An AI score is not an interview result. Use it to see whether you are improving from round to round, not as a verdict.
AI lets you practise more often, but your best answers still have to come from your own real stories.
How to start: a 3-day plan before the interview
- Day 1: Pick 4 to 5 real stories from your work, such as a success, a mistake, and a team conflict. Write topic notes, not scripts.
- Day 1: Set up the prompt with the JD and do a first round of 8 questions, answering every one out loud.
- Day 2: Revise your answers based on the feedback, then do a pressure round with probing questions.
- Day 3: Do one round with a real person to practise eye contact and pacing. See how in How to run a mock interview that works.
- The night before: Review only your topic notes. Do not memorise answers.
For another round of practice, try Interview Lab on Plants.work, and when you are ready, browse open roles on the job listings page.