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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Coding
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Productivity
Writing
Marketing
Writesonic B | Kling A | Perplexity S | ChatGPT Operator B | |
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| Tagline | SEO-first AI writer. Optimized for ranking content. | Kuaishou's video model. The surprise standout. | AI search done right. Cited answers, not chat theater. | OpenAI's browser agent. Clicks and types on websites for you. |
| Category | Marketing | Video | Research | Agents |
| Pricing | Free + $15-$99/mo | Credit-based, free trial | Free + $20/mo Pro | Included with ChatGPT Pro $200/mo |
| Best for | Content marketers churning out SEO articles. | Anyone who wants top-tier video quality for less. | Replacing Google for any question where you want a cited answer in seconds. | Power users willing to pay $200/mo for a browser bot. |
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| Kai's verdict | B-tier. Use Claude + manual SEO thinking. Writesonic is fast but generic. | A-tier. Rising fast. If you can tolerate the UX, quality per dollar is best-in-class. | 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. |
| Link | Open → | Open → | Open → | Open → |