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 | Grammarly A | Lovable A | |
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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. | Grammar check + tone + AI drafting, everywhere you type. | Build a full app from a prompt. Stripe-ready. |
| Category | Research | Agents | Writing | Design |
| Pricing | Free + $20/mo Pro | Included with ChatGPT Pro $200/mo | Free + $12-$15/mo Premium + team plans | Free + $25-$100/mo |
| 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. | Non-native English writers, business email, anyone who types a lot. | Non-devs + solopreneurs shipping MVPs. |
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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. | A-tier for non-native English speakers. B-tier if your English is already strong — Claude does better with tone. | A-tier. The strongest 'no-code' AI builder right now. Great for founder MVPs. |
| Link | Open → | Open → | Open → | Open → |