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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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Devin
A
Hex
A
Claude
S
TaglineCognition Labs' autonomous coding engineer.Modern data notebook with Magic AI assistant.Anthropic's flagship — best reasoning + longest useful context.
CategoryAgentsDataChatbots
Pricing$500/moFree + $28+/user/moFree + $20/mo Pro + team/enterprise
Best forEngineering teams offloading tickets. Ops/platform work.Data teams at startups + enterprises.Long writing, code, careful thinking, documents over 50 pages.
Strengths
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
  • SQL + Python + no-code in one notebook
  • Magic AI writes queries + viz for you
  • Team-grade collaboration
  • Best-in-class writing + nuanced reasoning
  • 1M context on Opus
  • Artifacts for code/docs
  • Lowest hallucination rate in my testing
Weaknesses
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
  • Overkill for casual users
  • Enterprise pricing
  • Image generation is weak
  • No native web search on all tiers
Kai's verdictA-tier for the right use case. Not for solo devs. If you manage engineers, try one license.A-tier for data teams. S-tier if you already live in SQL + Python.S-tier for reasoning and writing. If you only pay for one chatbot, pay for this one — especially for long work.
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