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
Perplexity S | ChatGPT Operator B | Sora A | Writesonic B | |
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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. | OpenAI's video model. Long clips, cinematic quality. | SEO-first AI writer. Optimized for ranking content. |
| Category | Research | Agents | Video | Marketing |
| Pricing | Free + $20/mo Pro | Included with ChatGPT Pro $200/mo | Included with ChatGPT Plus/Pro | Free + $15-$99/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. | ChatGPT subscribers experimenting with cinematic shots. | Content marketers churning out SEO articles. |
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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. Amazing when it works, frustrating when it doesn't. Runway still more reliable for pros. | B-tier. Use Claude + manual SEO thinking. Writesonic is fast but generic. |
| Link | Open → | Open → | Open → | Open → |