Perplexity — AI Search Engine with Source Citations
Not just AI chat — Perplexity searches the web in real-time and provides source links. No more worrying about AI hallucinations.
How is Perplexity Different?
Regular AI tools (ChatGPT, DeepSeek) rely on training data and can hallucinate. Perplexity is an AI search engine — it searches the web, aggregates multiple sources, and gives you answers with citations.
For teachers, this is crucial: you can see every source and fact-check.
Teacher Use Cases
1. Research
"What are the latest research findings on inquiry-based learning in science education?" — Results include academic journal links.
2. Fact-Checking Lessons
Use Perplexity to verify information before teaching, especially for General Studies and Science where outdated info is common.
3. Current Events
"Summarize the latest Hong Kong education policy changes in 2026 with sources" — Instant summary with cited references.
4. Teaching Students Research Skills
Teach students to use Perplexity for project work — they can see sources and learn proper citation.
Free vs Pro
| Feature | Free | Perplexity Pro |
|---|---|---|
| Searches | Daily limit | Unlimited Pro searches |
| Model choice | Basic model | GPT-4 / Claude / Gemini |
| File uploads | Limited | More daily uploads |
| Price | Free | US$20/month (~HK$155) |
Hong Kong Access
✅ Works directly. Visit perplexity.ai — no VPN needed.
Best for: Teachers who need fact-checking, research, and source citations. If you worry about AI hallucinations, Perplexity is the solution.