Perplexity vs ChatGPT Search — which one for research you have to defend?

The short version

• Research that will be cited, audited or challenged → Perplexity
• Occasional current-information questions inside a workflow → ChatGPT Search is enough
• Both, if research is most of your job and writing is the other half

What separates them

Perplexity is built so the sources are the output, not a footnote. Citations appear inline, you can see what each claim rests on, and Spaces keep a line of research organised over time. ChatGPT Search cites too, but the experience is optimised for answering rather than for showing its work.

The practical test: when you need to go back three weeks later and establish where a number came from, Perplexity makes that straightforward and ChatGPT makes it a search through your own history.

Cost

Both are $20 a month. If you already pay for ChatGPT Plus, the real question is whether research is frequent enough to justify a second subscription — which for consultants, analysts and journalists it usually is, and for most other roles it is not.