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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
Devin
A
Claude Code
S
TaglineAI search done right. Cited answers, not chat theater.Cognition Labs' autonomous coding engineer.Anthropic's CLI agent. Opus-powered, operates on your repo directly.
Categoryresearchagentscoding
PricingFree + $20/mo Pro$500/moPart of Claude Pro/Max/Team plans
Best forReplacing Google for any question where you want a cited answer in seconds.Engineering teams offloading tickets. Ops/platform work.Developers who want an agent, not autocomplete. Large refactors, tests, docs.
Strengths
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
  • Runs locally, edits your actual files
  • Strong on large codebases with 1M context
  • Great at multi-step tasks
Weaknesses
  • Not a general chatbot
  • Answers can be shallow on complex topics
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
  • Terminal-based — learning curve
  • Can't be used without Claude subscription
Kai's verdictS-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.A-tier for the right use case. Not for solo devs. If you manage engineers, try one license.S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement.
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