Best AI for research
What is the best AI for research?
Perplexity is the best AI for everyday research because every answer links to its sources, so you can check them. Gemini's free Deep Research is excellent for longer reports, and ChatGPT is best when you want to discuss and summarise what you've found. Always open the sources rather than trusting the summary.
Our shortlist
| # | Tool | Best for | Free plan? | Paid from |
|---|---|---|---|---|
| 1 | Perplexity | Best overall | Yes | US$20/month (Pro) |
| 2 | Gemini | Best for long reports | Yes | US$4.99/month (Google AI Plus, in 160+ countries) |
| 3 | ChatGPT | Best for discussing findings | Yes | US$8/month (Go, may include ads) |
1. Perplexity – best overall
Cited answers on the free plan; Pro is US$20/month for heavier use.
Free plan: Free plan with cited answers and limited daily advanced searches. Full Perplexity profile →
2. Gemini – best for long reports
Deep Research is listed on the free plan, with higher limits on paid Google AI plans.
Free plan: Free with a Google account, including Deep Research, Gemini Live and image generation, with lower usage limits. Full Gemini profile →
3. ChatGPT – best for discussing findings
Free plan includes limited deep research and file uploads.
Free plan: Free plan: everyday text chats with fair-use limits, plus limited uploads, image creation, voice and deep research. Full ChatGPT profile →
Try it now: step-by-step guides
Each guide has a copy-and-paste prompt you can use with any of the tools above.
Summarise a long document or meeting notes
Rough guide only: 20–40 minutes each time
💷 MoneyCompare products before you buy
Rough guide only: 1–2 hours of research
📚 Study & learningGet any topic explained simply
Rough guide only: 1 hour
💪 Health & fitnessPrepare questions for a doctor's appointment
Rough guide only: 20–30 minutes
📘 Get 20 ready-made prompts for research and more
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Things to watch out for
- Summaries can misquote sources.
- Check publication dates.
- Don't paste passwords, bank details or other people's private information into any AI tool.
How we chose
These are editorial picks by Amara Lewis, based on what each tool's free and paid plans include, how easy it is for a beginner, and how well it suits this task. We have not run formal benchmark tests for this page, and no company paid to be listed. Read how we review.
Frequently asked questions
Which AI gives sources?
Perplexity shows sources by default; Gemini and ChatGPT also cite web sources when they search.
Can I trust AI research?
Check the sources yourself – AI summaries can misread or misquote them.
Is AI good for academic research?
It's useful for finding and summarising, but use your library databases and cite original sources.
Not sure where to start?
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