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.Pick tools (3 selected)
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writing
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Perplexity S | Claude Code S | Grammarly A | |
|---|---|---|---|
| Tagline | AI search done right. Cited answers, not chat theater. | Anthropic's CLI agent. Opus-powered, operates on your repo directly. | Grammar check + tone + AI drafting, everywhere you type. |
| Category | research | coding | writing |
| Pricing | Free + $20/mo Pro | Part of Claude Pro/Max/Team plans | Free + $12-$15/mo Premium + team plans |
| Best for | Replacing Google for any question where you want a cited answer in seconds. | Developers who want an agent, not autocomplete. Large refactors, tests, docs. | Non-native English writers, business email, anyone who types a lot. |
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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. | S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement. | A-tier for non-native English speakers. B-tier if your English is already strong — Claude does better with tone. |
| Link | Open → | Open → | Open → |