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 (4 selected)
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Claude Code S | Devin A | Perplexity S | DeepSeek S | |
|---|---|---|---|---|
| Tagline | Anthropic's CLI agent. Opus-powered, operates on your repo directly. | Cognition Labs' autonomous coding engineer. | AI search done right. Cited answers, not chat theater. | Chinese open-weight powerhouse. Crazy cheap, genuinely smart. |
| Category | coding | agents | research | chat |
| Pricing | Part of Claude Pro/Max/Team plans | $500/mo | Free + $20/mo Pro | Free web + ultra-cheap API (~$0.14/M input tokens) |
| Best for | Developers who want an agent, not autocomplete. Large refactors, tests, docs. | Engineering teams offloading tickets. Ops/platform work. | Replacing Google for any question where you want a cited answer in seconds. | Developers + cost-conscious builders. Anyone fine with self-hosting. |
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| Kai's verdict | S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement. | A-tier for the right use case. Not for solo devs. If you manage engineers, try one license. | S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week. | S-tier for price/performance. A-tier for consumer use. If you build apps, this is the budget pick. |
| Link | Open → | Open → | Open → | Open → |