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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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S
Devin
A
Windsurf
A
Hex
A
TaglineAI search done right. Cited answers, not chat theater.Cognition Labs' autonomous coding engineer.Codeium's agentic IDE. Cascade agent + strong free tier.Modern data notebook with Magic AI assistant.
CategoryResearchAgentsCodingData
PricingFree + $20/mo Pro$500/moFree + $15/mo ProFree + $28+/user/mo
Best forReplacing Google for any question where you want a cited answer in seconds.Engineering teams offloading tickets. Ops/platform work.Developers who want Cursor-like power for less money.Data teams at startups + enterprises.
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
  • Cheaper than Cursor
  • Cascade agent for multi-file tasks
  • Solid free tier
  • SQL + Python + no-code in one notebook
  • Magic AI writes queries + viz for you
  • Team-grade collaboration
Weaknesses
  • Not a general chatbot
  • Answers can be shallow on complex topics
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
  • Smaller community
  • Model selection more limited
  • Overkill for casual users
  • Enterprise pricing
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.A-tier. Close second to Cursor. If $5/mo matters, start here.A-tier for data teams. S-tier if you already live in SQL + Python.
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