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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Devin A | Skye A | Perplexity S | ChatGPT Operator B | |
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| Tagline | Cognition Labs' autonomous coding engineer. | An agentic iPhone home screen that replaces your static icon grid with AI widgets that proactively surface health, calendar, finance, and local context — without you having to open a single app. | AI search done right. Cited answers, not chat theater. | OpenAI's browser agent. Clicks and types on websites for you. |
| Category | Agents | Agents | Research | Agents |
| Pricing | $500/mo | Waitlist / Beta (pricing not yet disclosed) | Free + $20/mo Pro | Included with ChatGPT Pro $200/mo |
| Best for | Engineering teams offloading tickets. Ops/platform work. | iPhone power users who are frustrated that Siri is still reactive and want their home screen to actually anticipate their day. | 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 | A-tier for the right use case. Not for solo devs. If you manage engineers, try one license. | The concept is genuinely compelling — turning the home screen into a living AI layer is a smarter bet than yet another chat interface — but this is vaporware until it ships publicly and we see whether Apple's sandbox lets it breathe. (Verdict pending Phi's full review.) | 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 → |