Compare AI tools
Side-by-side: what they do, what they cost, what Kai actually thinks. Pass up to 4 tools via ?tools=claude,chatgpt,gemini.
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Perplexity S | ChatGPT Operator B | Elicit S | MagicSchool S | |
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| Tagline | AI search done right. Cited answers, not chat theater. | OpenAI's browser agent. Clicks and types on websites for you. | AI research assistant for academic literature. | AI platform built for teachers. Lesson plans + IEPs + admin. |
| Category | Research | Agents | Research | Education |
| Pricing | Free + $20/mo Pro | Included with ChatGPT Pro $200/mo | Free + $12-$42/mo | Free + $100/yr Plus + school plans |
| Best for | Replacing Google for any question where you want a cited answer in seconds. | Power users willing to pay $200/mo for a browser bot. | Grad students, researchers, anyone doing literature reviews. | Teachers prepping materials. School districts. |
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| Kai's verdict | S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week. | B-tier. Still early. Manus is more flexible for less money. | S-tier for academic research. Nothing else comes close for systematic reviews. | S-tier for teachers. If you teach K-12, start here this week. |
| Link | Open → | Open → | Open → | Open → |