ChatGPT vs. DeepSeek vs. Copilot: Which AI should you use for your HK job hunt?

So you've heard AI can help with your job hunt — but which one should you actually use?

You're sitting in front of your laptop, staring at a job description on JobsDB. The requirements list is long, the salary range is vague, and you've already sent out 20 generic CVs this week with zero responses. Your friend tells you "just use ChatGPT to write your cover letter," but another friend swears by DeepSeek, and your cousin who works in tech says Copilot is the only way to go.

If you're a Hong Kong job seeker — whether you're a fresh graduate from HKU or a mid-career professional looking to switch industries — you've probably felt this confusion. Every AI tool promises to save time, but they work differently, and using the wrong one can actually hurt your chances.

Let's cut through the noise. In this guide, we'll compare ChatGPT, DeepSeek, and Microsoft Copilot specifically for the Hong Kong job hunt. We'll look at how each handles resume tailoring, cover letter writing, interview prep, and application form filling — on platforms like JobsDB, CTgoodjobs, LinkedIn Hong Kong, and Indeed.

Why the AI you choose matters more than you think

Here's a truth that most people don't realize: AI tools are not interchangeable. They are trained on different data, use different reasoning models, and have different strengths and weaknesses. Using the wrong AI for a specific task can produce generic, off-target, or even factually incorrect content that recruiters will spot immediately.

For example, ChatGPT (especially GPT-4) is excellent at generating fluent, human-like text. But it can also be overly verbose and sometimes "hallucinates" — making up facts or experiences that don't exist. If you ask it to write a cover letter and don't give it enough context, it will produce something that sounds good but says nothing specific about the job or the company.

DeepSeek, on the other hand, is a newer Chinese AI model that has gained popularity for its strong reasoning abilities and cost-effectiveness. It's particularly good at understanding Chinese-language contexts and can handle bilingual tasks well — which is crucial for Hong Kong's mixed-language work environment. However, its English output can sometimes feel slightly less natural than ChatGPT's.

Microsoft Copilot, which is built on GPT-4 but integrated with Microsoft 365, has a unique advantage: it can access your documents, emails, and calendar (with permission). For job seekers who already use Microsoft tools, Copilot can help organize your job search, summarize interview notes, and even draft emails. But it's not as flexible as ChatGPT for standalone tasks.

So which one should you use? The answer depends on what stage of the job hunt you're in. Let's break it down step by step.

Step 1: Tailoring your resume for each job posting

This is where most job seekers fail. They send the same CV to 50 companies and wonder why they never hear back. Hong Kong recruiters spend an average of 6–10 seconds scanning a resume. If your CV doesn't immediately show that you match the job requirements, it goes in the trash.

ChatGPT is your best friend here — but only if you know how to use it. Don't just paste your CV and say "make it better." Instead, give it the job description and your resume, then ask it to rewrite specific sections. For example: "Here's a job description for a Marketing Executive role at a Hong Kong FMCG company. Here's my current resume. Rewrite the 'Work Experience' section to highlight the skills and achievements most relevant to this role. Use bullet points. Keep each bullet to one line."

DeepSeek is surprisingly strong for this task, especially if the job description is in Chinese or a mix of English and Chinese. It understands the nuances of Hong Kong's bilingual job market better than ChatGPT. For example, if a job ad says "熟悉香港零售市場" (familiar with Hong Kong retail market), DeepSeek will naturally weave that language into your resume without sounding forced.

Copilot can help too, but it's less convenient because you typically need to use it within Microsoft Word or Edge. If you already have your resume in Word, Copilot can suggest rewrites directly in the document. However, its suggestions are often more conservative and less tailored than ChatGPT's.

Verdict for resume tailoring: Use ChatGPT for English-dominant roles, DeepSeek for bilingual or Chinese-dominant roles. Use Copilot if you live inside Microsoft Word.

Step 2: Writing cover letters that actually get read

Let's be honest: most cover letters are a waste of time. Recruiters know that candidates copy-paste from templates. But a genuinely tailored cover letter — one that references the specific job description and company — can make a difference, especially for roles in Hong Kong's competitive industries like banking, consulting, and tech.

ChatGPT can write a decent cover letter fast. The trick is to give it a detailed prompt. Include: the job title, company name, 3 key requirements from the job description, and 2–3 specific achievements from your experience that match those requirements. For example: "Write a cover letter for a Business Analyst role at HSBC. The job requires SQL, Python, and stakeholder management. I led a project that reduced reporting time by 30% using Python."

DeepSeek shines when the job description is in Chinese or when you need to write a cover letter that mixes English and Chinese naturally. Many Hong Kong companies expect a cover letter that shows you can operate in both languages. DeepSeek produces bilingual content that flows better than ChatGPT's sometimes awkward translations.

Copilot is the weakest of the three for cover letters. Its integration with Microsoft 365 means it can pull information from your LinkedIn profile or resume, but the output tends to be formulaic and lacks the personal touch that makes a cover letter stand out.

Verdict for cover letters: ChatGPT for English letters, DeepSeek for bilingual letters. Avoid Copilot for this task.

Step 3: Preparing for interviews

Hong Kong interviews can be intense. Whether it's a case interview for a consulting firm or a technical test for a fintech company, you need to prepare thoroughly. AI can help you practice.

ChatGPT is excellent for generating practice questions. Ask it: "Give me 10 common interview questions for a Data Analyst role in Hong Kong. For each question, give me a sample answer that uses the STAR method." You can even role-play by asking it to act as the interviewer and give you feedback on your answers.

DeepSeek is better at generating questions that are specific to Hong Kong's business culture. For example, it understands that Hong Kong interviewers often ask about "your understanding of the Greater Bay Area" or "how you handle working with colleagues from different cultural backgrounds." These are the kinds of questions that generic AI models might miss.

Copilot can help you organize your interview prep. Use it to summarize the company's recent news, financial reports, or product launches from the web. But it's not as interactive as ChatGPT for practice sessions.

Verdict for interview prep: Use ChatGPT for general practice, DeepSeek for Hong Kong-specific questions, Copilot for research.

Step 4: Filling out application forms quickly

This is the most tedious part of any job hunt. JobsDB, CTgoodjobs, LinkedIn, and Indeed all have slightly different forms, and you end up retyping the same information over and over. Some platforms let you upload a resume, but many still require manual entry for fields like education history, work experience, and skills.

ChatGPT can help you prepare a "master answer" document that you can copy-paste from. But it can't actually interact with the forms themselves.

DeepSeek offers similar capabilities — it can generate concise, platform-appropriate answers for common fields.

Copilot has a potential advantage here because of its integration with Microsoft Edge. If you're using Edge, Copilot can sometimes suggest autofill options based on your saved information. But it's inconsistent and doesn't work on all job platforms.

This is actually where a dedicated tool like Amploy comes in. Amploy is built specifically for Hong Kong job platforms. It reads the application form and fills in every field — name, experience, cover letter box, LinkedIn URL — with answers drawn from your profile and the specific job. You press Tab to accept each suggestion, so you stay in control. It's like having a personal assistant that never gets tired of copy-pasting.

Step 5: Tracking your applications without a spreadsheet

Most job seekers use a chaotic mix of email folders, browser bookmarks, and mental notes to track where they've applied. This is a disaster waiting to happen. You forget to follow up, you apply to the same job twice, or you lose track of which company is at which stage.

ChatGPT can help you create a simple tracking template, but it won't update automatically.

DeepSeek can do the same.

Copilot with Excel integration can help you build a more sophisticated tracker, but you still have to update it manually.

Again, this is where a purpose-built tool makes a difference. Amploy includes a job pipeline tracker that shows you exactly where every application stands — Saved, Applied, Interviewing, Offered, Rejected — without needing to touch a spreadsheet.

So which AI should you actually use?

Here's the honest answer: there's no single best AI for every part of your job hunt. You should use a combination.

• Use ChatGPT for brainstorming, drafting English cover letters, and practicing interview questions.
• Use DeepSeek for bilingual resume tailoring, Chinese-language job descriptions, and Hong Kong-specific interview prep.
• Use Copilot if you're already deep in the Microsoft ecosystem and want help organizing your research.
• Use a dedicated tool like Amploy for the boring but critical tasks: autofilling application forms and tracking your pipeline.

The key is to stop relying on one tool for everything. Each AI has strengths and weaknesses. Match the tool to the task, and you'll save time and get better results.

One more thing: the danger of trusting AI blindly

Before you go off and start using these tools, a word of caution. AI can make mistakes. It can invent experiences you don't have, use language that doesn't sound like you, or miss cultural nuances that matter in Hong Kong's workplace.

Always review and edit anything an AI produces for you. Read it out loud. Ask yourself: "Would I actually say this? Does this sound like me?" If the answer is no, rewrite it.

AI is a tool, not a replacement for your judgment. Use it to save time on the mechanical parts of the job hunt, but never let it speak for you.

---

Ready to stop copy-pasting and start landing interviews?

If you're tired of filling out the same application forms over and over, and you want a tool that works with Hong Kong's job platforms — not against them — try Amploy. It's free to start, and it handles the busywork so you can focus on what actually matters: preparing for interviews and landing the job.

No spreadsheets. No copy-paste marathons. Just a smarter way to apply.

[Try Amploy for free →]